“Believe it or not, no one has really addressed whether it’s feasible to terraform Mars since 1991,” said Nina Lanza, a planetary scientist at Los Alamos National Laboratory and co-author of the study. “Yet since then, we’ve made great strides in Mars science, geoengineering, launch capabilities and bioscience, which give us a chance to take a fresh look at terraforming research and ask ourselves what’s actually possible.”

Although the idea of making Mars more like Earth has been around for a long time, it turns out there hasn’t been much detailed scientific work on it. But now, thanks to progress in climate science, bioscience, and space technologies, researchers think it’s time for a fresh, serious look.

The basic idea would be to warm up the Martian atmosphere first. That could allow engineered microbes to start producing oxygen through photosynthesis. Slowly, this oxygen would build up, eventually supporting the presence of liquid water and paving the way for more complex life. But the paper points out that before jumping into big plans, we need to think seriously about what it would cost, what might go wrong, and whether it’s the right thing to do. As the authors write, “Before we can assess whether warming Mars is worthwhile, relative to the alternative of leaving Mars as a pristine wilderness, we must confront the practical requirements, cost, and possible risks.”

The paper takes a close look at what resources Mars actually has—things like water ice, carbon dioxide, and the makeup of its soil. It also discusses new ideas that could help raise the planet’s global temperature by several tens of degrees within a few decades. Some of these approaches involve boosting solar heating or releasing greenhouse gases to trap more heat in the atmosphere.

The researchers say future studies should focus on learning more about the physical, chemical, and biological limits of these ideas. Doing so would not only guide future Mars missions—it could also help science here on Earth. Tools like soil-repair technology, drought-resistant crops, and better ways to model ecosystems could benefit our own planet, too.

“Mars terraforming research offers a vital testbed for planetary science, potentially validating theories or exposing knowledge gaps,” the authors write. “Continued research promises significant scientific progress, regardless of whether full-scale terraforming occurs.”

And in the long run, they add, “We don’t even know what’s physically or biologically possible. … If people can learn how to terraform a world such as Mars, this may be the first step to destinations beyond.”

Source: Pioneer Labs, Los Alamos National Laboratory, Nature| Image via Depositphotos

This article was generated with some help from AI and reviewed by an editor. Under Section 107 of the Copyright Act 1976, this material is used for the purpose of news reporting. Fair use is a use permitted by copyright statute that might otherwise be infringing.

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Whether due to consumer backlash or an aging EV lineup, or both, Tesla sales have again seen a global plunge, this time 13 percent last quarter compared to the previous year—proof that the electric automaker hasn’t yet turned around a dismal year that saw public opinion of controversial CEO Elon Musk plummet. It could mean Tesla faces a second straight year of falling sales.

And yet: Tesla is still the world’s most valuable automaker by market capitalization, worth some $990 billion. At least some of that market confidence is likely traced to the happenings of June 22, when Tesla finally began allowing paying passengers to ride its autonomous vehicle service in Austin, Texas.

The service rollout has been fairly smooth. If the metric for success is “no crashes,” mission accomplished: There have been no public reports of crashes or fender-benders involving the robotaxis. The select few riders who have been allowed inside them have praised the service online, which for now costs just $4.20 a ride. (The price seems to be a weed joke.)

But there are plenty of caveats. For one thing, the program’s “early riders” appear to be Tesla influencers, online content creators who have financial stakes in the company or who run media businesses that tend to cheerlead for Tesla and/or electric vehicles. Tesla has not said when it will open the service to members of the public. (The company, which disbanded its PR team in October 2020, did not respond to any of WIRED’s questions.) For another, Tesla’s area of operations is notably smaller than Alphabet subsidiary Waymo’s, which began offering robotaxi service in the city through the Uber app in March.

For one more, there are plenty of humans involved in this driverless service. Tesla has a safety monitor in the front passenger seat of its robotaxis, who, according to online videos, seems poised to intervene if the technology makes a mistake. And Tesla has been less than transparent about its use of human teleoperators, who can either remotely drive or remotely assist its driverless technology. (The former is likely much safer than the latter, experts say, but Tesla hasn’t said which approach it uses.)

Missed Milestone

“Tesla has what I call the trifecta of babysitting going on right now,” says Missy Cummings, who researches autonomous vehicles at George Mason University, and has herself been the subject of Musk’s displeasure. The human contributions likely make Tesla’s service much safer, she says—something for which the automaker should be praised. In fact, keeping babysitting humans in the drivers’ seat is exactly what rivals Waymo and Zoox did in the early phases of their testing. (Waymo now offers robotaxi service in five cities; Zoox has said it will start service in Las Vegas this year.) “I want to encourage them to keep doing that,” she says.

But, for Cummings, the choice is likely evidence that Tesla is behind its competitors. “If learning to deploy a self-driving car system was grades K through 12, Tesla is in first grade,” she says. “Everything we're seeing in Texas suggests significant immaturity in self-driving operations.”

This means, too, that Tesla hasn’t hit the milestone Musk promised back in January, when he told investors that the company would launch “unsupervised full self-driving as a paid service in Austin in June…no one in the car.”

“This is a demo or test using safety drivers—it’s not an [autonomous vehicle] deployment,” says Bryant Walker Smith, a law professor at the University of South Carolina who studies autonomous vehicles. “Tesla is splashing around in the kiddie pool and everyone is asking where it’s going to place in the Olympic swim competition.”

Bloopers and Sensors

Tesla has kept quiet about many of the particulars of its technology. And it’s hard to reach definite conclusions about its tech from social media posts uploaded by riders. But some of those posts appear to show less-than-smooth rides. In one video, a robotaxi attempting to make a left turn appears to cross a double yellow line into oncoming traffic. In another, a robotaxi apparently fails to detect a UPS truck stopping and reversing to park, and the front seat safety monitor has to intervene to stop the car.

One YouTuber uploaded a video showing a robotaxi “phantom braking”—suddenly coming to a stop for no apparent reason—a phenomenon that’s also been flagged by hundreds of users of Tesla’s less-advanced Full Self-Driving (Supervised) feature and investigated by the federal government. Unlike actual self-driving technology, Full Self-Driving (Supervised) requires users to keep their eyes on the road.

The service pauses for bad weather, according to Tesla’s website. One YouTuber had their ride halted for a rainstorm; the robotaxi dropped the rider in an Austin park as the wind began to whip around them. Minutes later, according to a video, the same Robotaxi picked the creator up to continue their ride. However, contradicting the above, one poster has reported the cars perform “FLAWLESSLY” in heavy rain.

The early bloopers aren’t surprising, experts say. Full Self-Driving (Supervised) requires a human driver to intervene when needed, and it appears robotaxi is the same right now, says Philip Koopman, a professor at Carnegie Mellon University who studies autonomous vehicle safety. The slip-ups the robotaxis have made are not unlike what human drivers do on the road, he says. But autonomy’s value add is supposed to be safety, so it makes sense that the videos—and the tech’s “rough edges”—are making people nervous.

Camera Quandary

The launch has reopened public debates about a core tenet of Tesla’s technology: its use of cameras alone to perceive and “make decisions” as it drives. Musk and his company have long argued that artificial intelligence, supplemented by the data collected by cameras, is sufficient to operate a safe, driverless car. The CEO has promised that all of its cars can become autonomous without any modifications, with a simple push of updated software (though Tesla also quietly reneged on this claim). Other companies see more expensive sensors, including radar and lidar, as important validators and support. (Lidar has dramatically dropped in price; many Chinese automakers are now including the sensor on every car that they sell.)

Advances in large language models have convinced some in the auto industry that Musk’s approach is the right one. In a podcast interview published this week, Kyle Vogt, the former CEO of General Motors AV unit Cruise, argued that images from multiple vehicle-mounted cameras plus advanced models can be “really accurate.” (Vogt stepped down from Cruise after one of its driverless vehicles hit and dragged a pedestrian. The company was not transparent with regulators about the incident, a report later found.)

For Cummings, the reports out of Austin have confirmed her beliefs that cameras alone aren’t enough to operate a car autonomously. “There is no robotic system that exists that is safety critical—meaning people can die [using it]—that has ever been successful on a single sensor strain,” she says. “It's unclear why Tesla thinks that they can do what has never before been done.”

One metric that might reveal Tesla’s internal success: how quickly it expands. Musk boldly said in May that Tesla will have hundreds of thousands—and perhaps up to a million—autonomous vehicles on the road next year. The company seems motivated. According to a job posting, Tesla is hiring for additional vehicle operators, who are paid to drive cars around Austin to collect data. But, of course, Musk is no stranger to deadlines unmet.

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Welcome to Edition 8.01 of the Rocket Report! Today's edition will be a little shorter than normal because, for one day only, we celebrate fake rockets—fireworks—rather than the real thing. For our American readers, we hope you have a splendid Fourth of July holiday weekend. For our non-American readers, you may be wondering what the heck is happening in our country right now. Alas, making sense of <waves hands> all this is beyond the scope of this humble little newsletter.

As always, we welcome reader submissions, and if you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.

Will Orbex ever launch an orbital rocket? Orbex, a launch services company based in the United Kingdom, has announced the postponement of its first orbital launch to 2026 due to infrastructure limitations and other issues, Orbital Today reports. At the Paris Air Show at Le Bourget, Orbex chief executive Miguel Bello Mora announced that the company is now targeting next year for the liftoff of its Prime rocket from SaxaVord in Scotland. He said the delay is partly due to the limited launch infrastructure at SaxaVord and a "bottleneck" in site operations.

The real issue, revealed ... Orbex is developing the Prime rocket, but progress has been very slow. The company is now a decade old and has shown off relatively little hardware. It's difficult to believe the company will launch anytime soon. Tellingly, Orbex recently told the UK government it would need to raise a further 120 million pounds ($163 million) from private investors over the next four years to realize its ambitions. That seems like a huge ask. This newsletter has been skeptical of Orbex before, and this latest update only affirms that skepticism.

Themis demonstrator arrives in Sweden. Developed by ArianeGroup, a 30-meter launch vehicle intended to demonstrate reusable launch capability has arrived at the Esrange Space Center in northern Sweden, SVT reports. The initial phase of the test campaign will include wet-dress rehearsals and hot-fire tests, to be followed by a "hop test" that will occur no earlier than the end of this year.

Hopping higher and higher ... Based on experience from these initial tests, the program aims to fly the Themis demonstrator on higher and progressively more advanced tests, not dissimilar to what SpaceX did with its Grasshopper vehicle a little more than a decade ago in Texas. Eventually, Europe aims to use lessons learned from Themis to develop a reusable rocket similar to the Falcon 9 vehicle. (submitted by bjelkeman)

Electron launches twice in two days. Rocket Lab's "Symphony in the Stars" mission lifted off on Saturday, June 28, from Mahia Peninsula in New Zealand. The mission was the second of two launches from the same launch site in less than 48 hours, a new record for turnaround time, the company said. It's a sign of a maturing company that Rocket Lab can turn between launches so quickly.

Reaching an impressive cadence ... "Symphony in the Stars" was Rocket Lab’s tenth Electron mission of 2025 and its 68th launch overall as the company continues to increase the cadence of Electron launches. "The future of space is built on proven performance, and Electron continues to deliver against a stacked launch manifest this year," Rocket Lab founder Peter Beck said in a news release. It's been a good year for the firm, with 100 percent mission success.

Latitude announces expansion plans. In an emailed news release, the French launch startup Latitude said this week that it has secured a strategic industrial site south of Reims on the former AstraZeneca production facility. This site offers development potential of 270,000 sq. feet. By investing over 50 million euros ($58 million) in this site, Latitude aims to deliver on its promise of developing a small rocket with a high launch cadence.

Seeking to scale ... "Thanks to this location, we will be able to industrialize Zephyr production up to 50 units per year while maintaining control over our growth pace," said Isabelle Valentin, chief operating officer of the company. Latitude aims to launch its Zephyr rocket in 2026 from the Guiana Space Centre, in French Guiana, for the first time. The company also said it has signed two major contracts, including a strategic mission for the European Defence Fund and a contract with the French space agency, CNES, for microgravity demonstrations.

Japan's H2A rocket makes final flight. Japan’s flagship H2A rocket lifted off for the final time on Sunday from the Tanegashima Space Center in Kagoshima Prefecture, successfully concluding a 24-year run that has defined the nation’s space capabilities, The Japan Times reports. The rocket’s 50th and final mission carried the GOSAT-GW, a government-developed hybrid environmental observation satellite.

Out with the old, in with the new ... Jointly developed by Mitsubishi Heavy Industries and the Japan Aerospace Exploration Agency, the 53-meter rocket debuted in 2001 and quickly became the workhorse of the country’s space program. It had an excellent record, with 49 successes out of 50 launch attempts. The decision to retire the H2A comes amid rising global competition in the space launch industry, where cost-efficiency has become a key differentiator. Japan hopes its new H3 rocket, although expendable, will be more cost competitive.

SpaceX to win DOD satellite contract. The Trump administration plans to cancel a fleet of orbiting data relay satellites managed by the Space Development Agency and replace it with a secretive network that, so far, relies primarily on SpaceX's Starlink Internet constellation, Ars reports. While details of the Pentagon's plan remain secret, the White House proposal would commit $277 million in funding to kick off a new program called "pLEO SATCOM" or "MILNET." The funding line for a proliferated low-Earth orbit satellite communications network hasn't appeared in a Pentagon budget before, but plans for MILNET already exist in a different form.

X marks the spot ... Meanwhile, the budget proposal for fiscal year 2026 would eliminate funding for a new tranche of data relay satellites from the Space Development Agency. The pLEO SATCOM or MILNET program would replace them, providing crucial support for the Trump administration's proposed Golden Dome missile defense shield. While SpaceX's role isn't mentioned explicitly in the Pentagon's budget documents, the MILNET program is already on the books, and SpaceX is the lead contractor. It has been made public in recent months, after years of secrecy, although many details remain unclear.

Prometheus rocket engine undergoes testing. European rocket builder ArianeGroup announced this week that it completed a series of Prometheus rocket engine test ignitions in late June, marking a key milestone in the program, European Spaceflight reports. Developed under a European Space Agency contract, Prometheus is a reusable rocket engine capable of producing around 100 metric tons of thrust.

Launching soon from Sweden ... It is designed to be manufactured at a fraction of the cost of current European engines, with the use of additive manufacturing playing a key role in reducing production costs. According to ArianeGroup, the multiple ignitions over a single day represent a "significant advancement in the engine’s development." Prometheus will initially power the Themis demonstrator (see item above). Its first commercial application will be the two-stage Maia rocket, developed by MaiaSpace, an ArianeGroup subsidiary.

Do you want to buy SpaceX tokens? SpaceX remains a privately held company, which means that us mere mortals cannot invest in the launch firm. (To be clear, as a space reporter, I do not invest in any space companies. To do so would be unethical.) The DealBook newsletter has a report on a new trend in "tokens" that allows ordinary investors to invest in privately traded companies, including SpaceX.

Not technically equity ... Vlad Tenev, Robinhood’s chief executive, said that the tokens are not technically "equity," but that they "effectively give retail investors exposure to these private assets." Robinhood isn’t alone: The startup Republic is offering tokens meant to track the equity performance of SpaceX. Those will be sold to US investors via a loophole in a 2012 securities law. However, DealBook warns, unregulated private-company tokens could lead to a fragmented and less transparent ecosystem for investments, making it harder for regulators to protect the public.

Texas politicians seek to move shuttle Discovery. This week, a political effort to relocate the space shuttle Discovery from the Smithsonian to Space Center Houston has been merged with the so-called "One Big Beautiful Bill," which the US Senate passed on Tuesday, Ars reports. Among the bill's many provisions is $85 million for the Bring the Space Shuttle Home Act. Sponsored by US Sen John Cornyn, R–Texas, the bill calls for Discovery to be removed from its home of the past 13 years, the National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Virginia, and put it on display at Space Center Houston, the official visitor complex for NASA's Johnson Space Center in Texas.

Underestimating transport costs ... The Senate version of the bill provides "no less than $5 million" for the "transportation of the space vehicle'' and the remainder to go toward the construction of a facility to house it. The original text of the Bring the Space Shuttle Home Act called for the NASA administrator and the Smithsonian to jointly develop a plan for moving Discovery prior to appropriations being made by Congress. It is unclear whether the total amount allocated by the Senate would be enough; the National Air and Space Museum provided Congress with an estimate of $200 million to $300 million for the move. Speaking frankly, and as a resident of Houston, this bill is absurd, and the shuttle Discovery absolutely belongs in the Smithsonian. NASA is being told to cut science missions left and right, but funding can be found for this?

Next New Glenn launch will target Mars. Blue Origin is making steady progress toward the second launch of its New Glenn rocket, which could occur sometime this fall, Ars reports. Publicly, the company has said this second launch will take place no earlier than August 15. This is now off the table. One source told Ars that a mid- to late-September launch date was "realistic," but another person said late October or November was more likely.

A big landing on tap ... Blue Origin has been mum about the payload that will fly on this rocket, but multiple people have told Ars that the current plan is to launch NASA's ESCAPADE mission on the second launch of New Glenn. This mission encompasses a pair of small spacecraft that will be sent to Mars to study the red planet's magnetosphere. After ESCAPADE, Blue Origin has several missions tentatively plotted out. A much-anticipated mission to land Blue Origin's Mk1 lander on the Moon could take place during the first half of next year.

Next three launches

July 3: Soyuz 2.1a | Progress MS-31 | Baikonur Cosmodrome, Kazakhstan | 19:32 UTC

July 8: Falcon 9 | Starlink 10-28 | Cape Canaveral Space Force Station, Florida | 05:48 UTC

July 15: Eris | Initial test flight | Bowen Orbital Spaceport, Australia | 21:30 UTC

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In a memo to employees earlier this week, Meta CEO Mark Zuckerberg shared a vision for a near-future in which "personal [AI] superintelligence for everyone" forms "the beginning of a new era for humanity." The newly formed Meta Superintelligence Labs—freshly staffed with multiple high-level acquisitions from OpenAI and other AI companies—will spearhead the development of "our next generation of models to get to the frontier in the next year or so," Zuckerberg wrote.

Reading that memo, I couldn't help but think of another "vision for the future" Zuckerberg shared not that long ago. At his 2021 Facebook Connect keynote, Zuckerberg laid out his plan for the metaverse, a virtual place where “you're gonna be able to do almost anything you can imagine" and which would form the basis of "the next version of the Internet."

"The future of the Internet" of the recent past.

Credit: Meta

Zuckerberg believed in that vision so much at the time that he abandoned the well-known Facebook corporate brand in favor of the new name "Meta." "I'm going to keep pushing and giving everything I've got to make this happen now," Zuckerberg said at the time. Less than four years later, Zuckerberg seems to now be “giving everything [he's] got" for a vision of AI “superintelligence," reportedly offering pay packages of up to $300 million over four years to attract top talent from other AI companies (Meta has since denied those reports, saying, “The size and structure of these compensation packages have been misrepresented all over the place").

Once again, Zuckerberg is promising that this new technology will revolutionize our lives and replace the ways we currently socialize and work on the Internet. But the utter failure (so far) of those over-the-top promises for the metaverse has us more than a little skeptical of how impactful Zuckerberg’s vision of “personal superintelligence for everyone" will truly be.

Meta-vision

Looking back at Zuckerberg’s 2021 Facebook Connect keynote shows just how hard the company was selling the promise of the metaverse at the time. Zuckerberg said the metaverse would represent an “even more immersive and embodied Internet" where “everything we do online today—connecting socially, entertainment, games, work—is going to be more natural and vivid."

Mark Zuckerberg lays out his vision for the metaverse in 2021.

"Teleporting around the metaverse is going to be like clicking a link on the Internet," Zuckerberg promised, and metaverse users would probably switch between “a photorealistic avatar for work, a stylized one for hanging out, and maybe even a fantasy one for gaming." This kind of personalization would lead to “hundreds of thousands" of artists being able to make a living selling virtual metaverse goods that could be embedded in virtual or real-world environments.

“Lots of things that are physical today, like screens, will just be able to be holograms in the future," Zuckerberg promised. “You won't need a physical TV; it'll just be a one-dollar hologram from some high school kid halfway across the world… we'll be able to express ourselves in new joyful, completely immersive ways, and that's going to unlock a lot of amazing new experiences."

A pre-rendered concept video showed metaverse users playing poker in a zero-gravity space station with robot avatars, then pausing briefly to appreciate some animated 3D art a friend had encountered on the street. Another video showed a young woman teleporting via metaverse avatar to virtually join a friend attending a live concert in Tokyo, then buying virtual merch from the concert at a metaverse afterparty from the comfort of her home. Yet another showed old men playing chess on a park bench, even though one of the players was sitting across the country.

Meta-failure

Fast forward to 2025, and the current reality of Zuckerberg’s metaverse efforts bears almost no resemblance to anything shown or discussed back in 2021. Even enthusiasts describe Meta’s Horizon Worlds as a “depressing" and “lonely" experience characterized by “completely empty" venues. And Meta engineers anonymously gripe about metaverse tools that even employees actively avoid using and a messy codebase that was treated like “a 3D version of a mobile app. "

Even Meta employees reportedly don't want to work in Horizon Workrooms.

Credit: Facebook

The creation of a $50 million creator fund seems to have failed to encourage peeved creators to give the metaverse another chance. Things look a bit better if you expand your view past Meta’s own metaverse sandbox; the chaotic world of VR Chat attracts tens of thousands of daily users on Steam alone, for instance. Still, we’re a far cry from the replacement for the mobile Internet that Zuckerberg once trumpeted.

Then again, it’s possible that we just haven’t given Zuckerberg’s version of the metaverse enough time to develop. Back in 2021, he said that “a lot of this is going to be mainstream" within “the next five or 10 years." That timeframe gives Meta at least a few more years to develop and release its long-teased, lightweight augmented reality glasses that the company showed off last year in the form of a prototype that reportedly still costs $10,000 per unit.

Maybe those glasses will ignite widespread interest in the metaverse in a way that Meta’s bulky, niche VR goggles have utterly failed to. Regardless, after nearly four years and roughly $60 billion in VR-related losses, Meta thus far has surprisingly little to show for its massive investment in Zuckerberg’s metaverse vision.

Our AI future?

When I hear Zuckerberg talk about the promise of AI these days, it’s hard not to hear echoes of his monumental vision for the metaverse from 2021. If anything, Zuckerberg’s vision of our AI-powered future is even more grandiose than his view of the metaverse.

As with the metaverse, Zuckerberg now sees AI forming a replacement for the current version of the Internet. “Do you think in five years we’re just going to be sitting in our feed and consuming media that's just video?" Zuckerberg asked rhetorically in an April interview with Drawkesh Patel. “No, it's going to be interactive," he continued, envisioning something like Instagram Reels, but “you can talk to it, or interact with it, and it talks back, or it changes what it's doing. Or you can jump into it like a game and interact with it. That's all going to be AI."

Mark Zuckerberg talks about all the ways superhuman AI is going to change our lives in the near future.

As with the Metaverse, Zuckerberg sees AI as revolutionizing the way we interact with each other. He envisions “always-on video chats with the AI" incorporating expressions and body language borrowed from the company’s work on the metaverse. And our relationships with AI models are “just going to get more intense as these AIs become more unique, more personable, more intelligent, more spontaneous, more funny, and so forth," Zuckerberg said. "As the personalization loop kicks in and the AI starts to get to know you better and better, that will just be really compelling."

Zuckerberg did allow that relationships with AI would “probably not" replace in-person connections, because there are “things that are better about physical connections when you can have them." At the same time, he said, for the average American who has three friends, AI relationships can fill the “demand" for “something like 15 friends" without the effort of real-world socializing. “People just don't have as much connection as they want," Zuckerberg said. “They feel more alone a lot of the time than they would like."

Why chat with real friends on Facebook when you can chat with AI avatars?

Credit: Benj Edwards / Getty Images

Zuckerberg also sees AI leading to a flourishing of human productivity and creativity in a way even his wildest metaverse imaginings couldn’t match. Zuckerberg said that AI advancement could “lead toward a world of abundance where everyone has these superhuman tools to create whatever they want." That means personal access to “a super powerful [virtual] software engineer" and AIs that are “solving diseases, advancing science, developing new technology that makes our lives better."

That will also mean that some companies will be able to get by with fewer employees before too long, Zuckerberg said. In customer service, for instance, “as AI gets better, you're going to get to a place where AI can handle a bunch of people's issues," he said. “Not all of them—maybe 10 years from now it can handle all of them—but thinking about a three- to five-year time horizon, it will be able to handle a bunch.“

In the longer term, Zuckerberg said, AIs will be integrated into our more casual pursuits as well. "If everyone has these superhuman tools to create a ton of different stuff, you're going to get incredible diversity," and "the amount of creativity that's going to be unlocked is going to be massive," he said. "I would guess the world is going to get a lot funnier, weirder, and quirkier, the way that memes on the Internet have gotten over the last 10 years."

Compare and contrast

To be sure, there are some important differences between the past promise of the metaverse and the current promise of AI technology. Zuckerberg claims that a billion people use Meta’s AI products monthly, for instance, utterly dwarfing the highest estimates for regular use of “the metaverse" or augmented reality as a whole (even if many AI users seem to balk at paying for regular use of AI tools). Meta coders are also reportedly already using AI coding tools regularly in a way they never did with Meta’s metaverse tools. And people are already developing what they consider meaningful relationships with AI personas, whether that’s in the form of therapists or romantic partners.

Still, there are reasons to be skeptical about the future of AI when current models still routinely hallucinate basic facts, show fundamental issues when attempting reasoning, and struggle with basic tasks like beating a children’s video game. The path from where we are to a supposed “superhuman" AI is not simple or inevitable, despite the handwaving of industry boosters like Zuckerberg.

Artist's conception of Carmack's VR avatar waving goodbye to Meta.

At the 2021 rollout of Meta’s push to develop a metaverse, high-ranking Meta executives like John Carmack were at least up front about the technical and product-development barriers that could get in the way of Zuckerberg’s vision. "Everybody that wants to work on the metaverse talks about the limitless possibilities of it," Carmack said at the time (before departing the company in late 2022). "But it's not limitless. It is a challenge to fit things in, but you can make smarter decisions about exactly what is important and then really optimize the heck out of things."

Today, those kinds of voices of internal skepticism seem in short supply as Meta sets itself up to push AI in the same way it once backed the metaverse. Don’t be surprised, though, if today’s promise that we're at "the beginning of a new era for humanity" ages about as well as Meta’s former promises about a metaverse where "you're gonna be able to do almost anything you can imagine."

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Type Ia supernovae are critical tools in astronomy, since they all appear to explode with the same intensity, allowing us to use their brightness as a measure of distance. The distance measures they've given us have been critical to tracking the expansion of the Universe, which led to the recognition that there's some sort of dark energy hastening the Universe's expansion. Yet there are ongoing arguments over exactly how these events are triggered.

There's widespread agreement that type Ia supernovae are the explosions of white dwarf stars. Normally, these stars are composed primarily of moderately heavy elements like carbon and oxygen, and lack the mass to trigger additional fusion. But if some additional material is added, the white dwarf can reach a critical mass and reignite a runaway fusion reaction, blowing the star apart. But the source of the additional mass has been somewhat controversial.

But there's an additional hypothesis that doesn't require as much mass: a relatively small explosion on a white dwarf's surface can compress the interior enough to restart fusion in stars that haven't yet reached a critical mass. Now, observations of the remains of a supernova provide some evidence of the existence of these so-called "double detonation" supernovae.

Deconstructing white dwarfs

White dwarfs are the remains of stars with a similar mass to our Sun. After having gone through periods during which hydrogen and helium were fused, these tend to end up as carbon and oxygen-rich embers: hot due to their history, but incapable of reaching the densities needed to fuse these elements. Left on their own, these stellar remnants will gradually cool.

But many stars are not left on their own; they exist in binary systems with a companion, or even larger systems. These companions can provide the material needed to boost white dwarfs to the masses that can restart fusion. There are two potential pathways for this to happen. Many stars go through periods where they are so large that their gravitational pull is barely enough to hold on to their outer layers. If the white dwarf orbits closely enough, it can pull in material from the other star, boosting its mass until it passes a critical threshold, at which point fusion can restart.

In other cases, another member of the system will go on to form a second white dwarf. If gravitational instabilities bring these two objects together, then their collision will create a single object with a much higher mass. This will also restart fusion, leading to an explosion.

We have found evidence for both of these events happening. However, there are some questions about whether they happen often enough to explain the frequency of type Ia supernovae that we see. Both mechanisms require stars of sufficient mass orbiting within a reasonably close distance for either mass transfer or a collision to occur. So, astronomers have been considering other ways of blowing up a white dwarf.

The most promising option appears to be a double detonation. This can also require the transfer of some helium-rich material from another companion, but it can also occur if the white dwarf ends up with some unfused helium left on its surface. Regardless of how it ends up there, the helium can start fusing if enough of it pools up, or simply if its movement causes a sufficiently high local density in one region. However it happens, once fusion starts, the entire surface of the white dwarf will quickly follow, creating detonation number one.

That in turn will create compression in the carbon-oxygen portion of the white dwarf, pushing it past the density needed for that to start fusing. Once again, the initiation of fusion heats and compresses nearby material, creating a chain reaction that triggers widespread fusion in the white dwarf, blowing it to pieces as part of detonation two.

A shell game

The key thing about this is that it allows the explosion of white dwarfs before they reach a mass sufficient enough to trigger the fusion of their carbon and oxygen. Instead, it can potentially happen any time enough helium gathers on their surface. A double-detonation event would also be very difficult to detect, as the explosions would happen in rapid succession, and the environment in the immediate surroundings of a type Ia supernova is going to be complex and difficult to resolve.

That said, the two detonations involve the fusion of different elements, and therefore are going to end up producing different materials. "The detonations in the carbon-oxygen core and the helium-rich shell result in qualitatively different yield products," the researchers behind the new work write in a paper describing it. In the paper, they focus on calcium, which there are two ways of producing. One is from the outer shell of helium, via fusion before the detonation dilutes the material. A second batch of calcium is produced through the fusion of the core material as it's ejected in the supernova, which prevents further fusion events from converting it to even heavier elements. (Material deeper in the core does end up getting fused into heavier material.)

Because it's produced by both of the detonations, models predict that the expanding sphere of debris will contain two different shells of calcium, with some space in between them. To find evidence for these shells, the researchers checked an older supernova remnant, which allows enough time for the movement of material to separate the shells by enough distance that they can be resolved from Earth.

They focused their observations on a supernova remnant named SNR 0509-67.5, located in the nearby Large Magellanic Cloud. SNR 0509-67.5 is estimated to be a bit over 300 years old, meaning material has had enough time to move a significant distance away from the site of the explosion. Imaging using a spectrograph on the Very Large Telescope allowed them to resolve what, in effect, was a spherical sulfur sandwich, with the role of the bread played by calcium. In other words, if you were to travel away from the site of the explosion, you would first hit a layer of ionized calcium, followed by ionized sulfur, and then run into a second layer of ionized calcium.

This is exactly what computer models that simulate double detonations predict. So, the researchers suggest it is strong support for that hypothesis. The researchers say that the details suggest that SNR 0509-67.5 was a white dwarf with roughly the same mass as the Sun when it exploded, and that its explosion was likely triggered by the detonation of a helium shell with only three percent of the Sun's mass.

While the physics of the process itself are interesting, the key question this raises is whether type Ia supernovae really are all equally bright. If they can detonate with substantially less mass than is needed for direct ignition of the core, then it's possible that some of them could be considerably less bright. However, the research team notes that there are additional complications: If there's a second white dwarf orbiting sufficiently close, then the debris from the supernova could also trigger a double detonation in that one, potentially with a timing and separation that would make the two impossible to distinguish. So, we likely need to do a fair bit of modeling to fully understand the consequences of these findings.

Nature Astronomy, 2025. DOI: 10.1038/s41550-025-02589-5  (About DOIs).

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There is increasing consumer demand for low- or non-alcoholic beers, and science is helping improve both the brewing process and the flavor profiles of the final product. One promising approach to better non-alcoholic beer involves substituting barley malt with milled rice, according to two recent papers—one published in the International Journal of Food Properties and the other published in the Journal of the American Society of Brewing Chemists.

The chemistry of brewing beer is a very active area of research. For instance, earlier this year, we reported on Norwegian scientists who discovered that sour beers made with the sugars found in peas, beans, and lentils had similar flavor profiles to your average Belgian-style sour beer, yet the brewing process was shorter, with simpler steps. The pea-sugar beers had more lactic acid, ethanol, and flavor compounds than those brewed without them, and they were rated as having fruitier flavors and higher acidity. And sensory panelists detected no trace of undesirable "bean-y" flavors that have limited the use of pea-based ingredients in the past.

But replacing barley malt with rice still might strike some beer aficionados as sacrilege. In Germany, "purity laws" dictate that any beverage classified as a beer—including non-alcoholic beers—must only be made from malted barley, hops, water, and yeast. This produces non-alcoholic beers that have more "worty" flavors (due to higher levels of aldehyde) than might ideally be desired. But not every country is as stringent as Germany. The US is much more flexible when it comes to selecting raw materials, including rice, for brewing beers. In fact, Arkansas just passed a bill this spring creating incentives for using rice (grown in Arkansas, of course) in the production of sake and beer.

“Rice isn’t just neutral filler. It’s a tool for innovation,” said co-author Scott Lafontaine, a food chemist at the University of Arkansas System Division of Agriculture. “It’s time we move beyond outdated perceptions and recognize what rice can offer in creating beer that’s sessionable [under 5 percent alcohol], efficient, and aligned with both tradition and the evolving preferences of today’s consumer.”

Rice, rice, baby

But all rice varietals are not created equal when it comes to brewing beer. Many cultivars currently favored for food applications were chosen for their higher head rice yields and lower glycemic properties; the latter requires rice with higher amylose content and higher gelatinization temperatures—the exact opposite of what's needed for beer. "Without international sourcing and closer collaboration with rice breeders, brewers risk losing access to cultivars best suited for brewing performance," said Lafontaine.

He and his team—including Christian Schubert, a visiting postdoc from the Research Institute for Raw Materials and Beverage Analysis in Berlin—brewed their own non-alcoholic beers, ranging from those made with 100 percent barley malt to ones made with 100 percent rice. They conducted a volatile chemical analysis to identify specific compounds present in the beers and assembled two sensory panels of tasters (one in the US, one in Europe) to assess aromas, flavors, and mouthfeel.

The panelists determined the rice-brewed beers had less worty flavors, and the chemical analysis revealed why: lower levels of aldehyde compounds. Instead, other sensory attributes emerged, most notably vanilla or buttery notes. "If a brewer wanted a more neutral character, they could use nonaromatic rice," the authors wrote. Along with brewing beers with 50 percent barley/50 percent rice, this would produce non-alcoholic beers likely to appeal more broadly to consumers.

The panelists also noted that higher rice content resulted in beers with a fatty/creamy mouthfeel—likely because higher rice content was correlated with increased levels of larger alcohol molecules, which are known to contribute to a pleasant mouthfeel. But it didn't raise the alcohol content above the legal threshold for a nonalcoholic beer.

There were cultural preferences, however. The US panelists didn't mind worty flavors as much as the European tasters did, which might explain why the former chose beers brewed with 70 percent barley/30 percent rice as the optimal mix. Their European counterparts preferred the opposite ratio (30 percent barley/70 percent rice). The explanation "may lie in the sensory expectations shaped by each region's brewing traditions," the authors wrote. Fermentation also occurred more quickly as the rice content increased because of higher levels of glucose and fructose.

The second study focused on testing 74 different rice cultivars to determine their extract yields, an important variable when it comes to an efficient brewing process, since higher yields mean brewers can use less grain, thereby cutting costs. This revealed that cultivars with lower amylose content cracked more easily to release sugars during the mashing process, producing the highest yields. And certain varieties also had lower gelatinization temperatures for greater ease of processing.

International Journal of Food Science, 2025. DOI: 10.1080/10942912.2025.2520907  (About DOIs)

Journal of the American Society of Brewing Chemists, 2025. DOI: 10.1080/03610470.2025.2499768

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Tesla sold 384,122 electric vehicles during the months of April, May, and June of this year. That's a double-digit decline compared to the same three months of last year—itself no peach of a quarter for a car company with a stratospheric valuation based on the supposition of eternal sales growth.

The automaker faces a number of problems that are getting in the way of that perpetual growth. In some regions, CEO Elon Musk's right-wing politics have driven away customers in droves. Another issue is the company's small, infrequently updated model lineup, which is a problem even in parts of the world that care little about US politics.

Most Tesla sales are of the Model 3 midsize electric sedan and the Model Y, its electric crossover. For Q2 2025, Tesla sold 373,728 of the Models 3 and Y across North America, Europe, China, and its other markets. But that's an 11.5 percent decrease compared to the 422,405 Models 3 and Y that Tesla sold in Q2 2024, a quarter that itself saw a year-on-year decline.

The rest of Tesla's sales are a mix of the increasingly elderly Model S sedan and Model X SUV, as well as the US-only Cybertruck. Here, the decline is far more severe—with just 10,394 sold, that's a 22.5 percent decrease on Q2 2024. Tesla does not break these numbers out with more granularity, so it's unclear just how few Cybertrucks were among that, but it does bring to mind Musk's claims that Tesla would sell between 250,000 and 500,000 Cybertrucks a year.

Total EV deliveries amounted to a 13.5 percent reduction compared to the 443,956 Teslas sold during the same period in 2024.

Last year, we saw a big mismatch between production and delivery numbers for the Models 3 and Y as Tesla attempted to sell off excess inventory. This year, production and sales are more closely matched, but Tesla still built more than it needed to, with 396,858 Models 3 and Y leaving its factories.

Production of its other models amounted to 13,409 units in total, a 44.7 percent drop compared to the same three months last year, but the total production numbers for Q2 2024 (410,831) and Q2 2025 (410,244) are almost identical.

Tesla also says it installed 9.6 GWh of energy storage products in Q2 2025, a slight change from the 9.4 GWh it managed for Q4 2024.

Tesla will release its financial results for the quarter on July 23.

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There is a growing buzz in the astronomy community about a new object with a hyperbolic trajectory that is moving toward the inner Solar System.

Early on Wednesday, the European Space Agency confirmed that the object, tentatively known as A11pl3Z, did indeed have interstellar origins.

"Astronomers may have just discovered the third interstellar object passing through the Solar System!" the agency's Operations account shared on Bluesky. "ESA’s Planetary Defenders are observing the object, provisionally known as #A11pl3Z, right now using telescopes around the world."

Only recently identified, astronomers have been scrambling to make new observations of the object, which is presently just inside the orbit of Jupiter and will eventually pass inside the orbit of Mars when making its closest approach to the Sun this October. Astronomers are also looking at older data to see if the object showed up in earlier sky surveys.

An engineer at the University of Arizona's Catalina Sky Survey, David Rankin, said recent estimates of the object's eccentricity are about 6. A purely circular orbit has an eccentricity value of 0, and anything above 1 is hyperbolic. Essentially, this is a very, very strong indication that A11pl3Z originated outside of the Solar System.

NASA's Center for Near Earth Object Studies has begun to post preliminary data about the object here. It poses no threat to Earth and, unfortunately, it appears that our planet will be on the opposite side of the Sun when the object makes its closest approach.

This is the third object suspected to be of interstellar origin that has been observed passing through the Solar System. Astronomers expect to find more with new tools designed to identify near-Earth objects. The first of these was ʻOumuamua, discovered in 2017, when it was already moving away from the Sun. It was likely cigar-shaped, and astronomers could only speculate about its nature and age. A couple of years later, astronomers found another object, 2I/Borisov, that was determined to be a rogue comet passing through the Solar System.

Now, with A11pl3Z, the hunt begins anew as astronomers will attempt to glean details about this interstellar interloper.

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An mRNA-based seasonal flu vaccine from Moderna was 27 percent more effective at preventing influenza infections than a standard flu shot, the company announced this week.

Moderna noted that the new shot, dubbed mRNA-1010, hit the highest efficacy target that it set for the trial, which included nearly 41,000 people aged 50 and above. Participants were randomly assigned to receive either mRNA-1010 or a standard shot and were then followed for about six months during a flu season.

Compared to the standard shot, the mRNA vaccine had an overall vaccine efficacy that was 26.6 percent higher, and 27.4 percent higher in participants who were aged 65 years or older. Previous trial data showed that mRNA-1010 generated higher immune responses in participants than both regular standard flu shots and high-dose flu shots.

The company noted that the positive results for the new trial come in the wake of one of the worst flu seasons in years. During the 2024–2025 flu season, the Centers for Disease Control and Prevention estimates that 770,000 people in the US were hospitalized for the flu.

"Today's strong Phase 3 efficacy results are a significant milestone in our effort to reduce the burden of influenza in older adults," Moderna CEO Stéphane Bancel said in a statement. "The severity of this past flu season underscores the need for more effective vaccines. An mRNA-based flu vaccine has the potential advantage to more precisely match circulating strains, support rapid response in a future influenza pandemic, and pave the way for COVID-19 combination vaccines."

Uncertain future

At present, the fate of promising vaccines such as mRNA-1010 is uncertain as the US health department is currently helmed by anti-vaccine activist Robert F. Kennedy Jr. Under Kennedy, the health department announced that "all new vaccines" would be required to go through placebo-controlled trials. That means that participants in a trial who are not given the experimental vaccine must be given an inert placebo rather than an already-approved vaccine as a comparative group, as was the case in the new trial with mRNA-1010.

Experts have pointed out that giving a placebo to participants when a safe vaccine already exists against potentially life-threatening infections is unethical, which is why it's not done.

Beyond that, Kennedy has canceled grants awarded to Moderna under the Biden administration to develop mRNA-based pandemic influenza vaccines. A health department spokesperson said at the time that the "reality is that mRNA technology remains under-tested."

Last week, Kennedy also worked to restrict access to flu vaccines that contain an ethylmercury-containing preservative, despite decades of data indicating their safety.

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A boomerang carved from a mammoth tusk is one of the oldest in the world, and it may be even older than archaeologists originally thought, according to a recent round of radiocarbon dating.

Archaeologists unearthed the mammoth-tusk boomerang in Poland’s Oblazowa Cave in the 1990s, and they originally dated it to around 18,000 years old, which made it one of the world’s oldest intact boomerangs. But according to recent analysis by University of Bologna researcher Sahra Talamo and her colleagues, the boomerang may have been made around 40,000 years ago. If they’re right, it offers tantalizing clues about how people lived on the harsh tundra of what’s now Poland during the last Ice Age.

A boomerang carved from mammoth tusk

The mammoth-tusk boomerang is about 72 centimeters long, gently curved, and shaped so that one end is slightly more rounded than the other. It still bears scratches and scuffs from the mammoth’s life, along with fine, parallel grooves that mark where some ancient craftsperson shaped and smoothed the boomerang. On the rounded end, a series of diagonal marks would have made the weapon easier to grip. It’s smoothed and worn from frequent handling: the last traces of the life of some Paleolithic hunter.

Based on experiments with a replica, the Polish mammoth boomerang flies smoothly but doesn’t return, similar to certain types of Aboriginal Australian boomerangs. In fact, it looks a lot like a style used by Aboriginal people from Queensland, Australia, but that’s a case of people in different times and places coming up with very similar designs to fit similar needs.

But critically, according to Talamo and her colleagues, the boomerang is about 40,000 years old.

That’s a huge leap from the original radiocarbon date, made in 1996, which was based on a sample of material from the boomerang itself and estimated an age of 18,000 years. But Talamo and her colleagues claim that original date didn’t line up well with the ages of other nearby artifacts from the same layer of the cave floor. That made them suspect that the boomerang sample may have gotten contaminated by modern carbon somewhere along the way, making it look younger. To test the idea, the archaeologists radiocarbon dated samples from 13 animal bones—plus one from a human thumb—unearthed from the same layer of cave floor sediment as the boomerang.

What about the human thumb?

The human thumb-bone (or left distal phalanx, if you’re feeling fancy) is an intriguing part of the boomerang’s story. Archaeologists found the boomerang buried near a circle of boulders in the center of the cave chamber, buried alongside tools made from antlers, a pair of arctic fox-tooth pendants, a bone bead... oh, and the last bone from someone’s left thumb.

Talamo and her colleagues speculate that there was some kind of ritual involved (archaeologists in general are fond of such speculation, but there may be something to it in this case). The boulders “appear to have been transported from the nearby river and intentionally placed,” they write in their paper.

So not only is this a boomerang carved from a mammoth tusk, and not only does it apparently date to a period when most paleoanthropologists have thought central and northern Europe were largely deserted, but it may have been part of a ritual so ancient that we have no way of reconstructing its meaning or details.

Surviving in a prehistoric climatic wasteland

Archaeologists aren’t sure who invented boomerangs first, but at various times in human history, people on at least three continents seem to have thought to use a curved, flat stick that spins as it flies through the air to hit a target. Examples have been found in Africa, Australia, and Europe. In other words, boomerangs, like spears and bows, seem to be a frequent solution to the same basic problem: how to hit things with a stick.

Even at 18,000 years old, the mammoth boomerang was already among the oldest examples of spinning-flying-flat-stick technology (some might even have called it revolutionary) in the world. But with the updated age estimate, the Oblazowa Cave boomerang reveals some interesting things about the people who lived in what’s now Poland during the last Ice Age.

Until recently, it looked as though central and northern Europe lay uninhabited for thousands of years after the last Neanderthals either left or died out.

“Environmental shifts after 42,000 years ago, associated with central European climatic deterioration, positioned the cold-steppe landscapes north of 49 degrees North as challenging for sustained settlements,” write Talamo and her colleagues. In other words, a cold and hostile climate made the northern half of Europe sort of a prehistoric postapocalyptic wasteland—or not, according to the new dates from Oblazowa Cave.

When Talamo and her colleagues dated the animal bones and the human phalanx, the results suggested that people had lived in Oblazowa Cave for about 3,500 years during this period of “climatic deterioration.” They apparently stayed through phases of relative warmth and deeper cold. That demonstrates what Talamo and her colleagues describe as “resilience in the face of environmental variability.” And not only were people making a living at Oblazowa Cave, they were faring well enough to make something as time-consuming, labor-intensive, and frankly inconvenient as a mammoth ivory boomerang.

Red stripes make it go faster

“This boomerang reflects a unique choice by the group at Oblazowa Cave,” write Talamo and her colleagues, and it’s hard not to read that in a slightly bemused tone.

Unlike stone spear points and wooden spears or throwing sticks, or even wooden boomerangs, this was a tool that would have taken huge amounts of time and work to create—things that are in short supply when your lifestyle is built around mobility. But someone (or maybe multiple people, we don’t know) invested the effort to carve the shape of the boomerang from a solid mammoth tusk. Female woolly mammoth tusks could be up to 9.3 centimeters thick, and male tusks could boast diameters up to 18 centimeters, which meant that someone had to chip away a lot of ivory to get the thin, flattish shape of the boomerang, then smooth it into just the geometry to make it fly properly.

And not only did someone go to the effort of making the boomerang, they even decorated it; it’s marked with deep, wide incisions, and they contain traces of red pigment. The boomerang was clearly made to be used, but it wasn’t purely utilitarian; someone wanted this thing to look cool while it was whizzing through the air.

PLOS One, 2025. DOI: 10.1371/journal.pone.0324911 (About DOIs).

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WR 134, a Wolf-Rayet Star in the constellation Cygnus.  

Credit: Chris McGrew

In the 1800s, astronomers were mystified by the discovery of stars that displayed highly unusual emission lines. It was only after 1868, when scientists discovered the element helium, that astronomers were able to explain the broad emission bands due to the presence of helium in these stars.

Over time, these stars became known as Wolf-Rayet stars (Charles Wolf was a French astronomer, and helium was first detected by the French scientist Georges Rayet and others), and astronomers came to understand that they were the central stars within planetary nebulae, and continually ejecting gas at high velocity.

This gives Wolf-Rayet stars a distinctive appearance in the night sky. And this week, Chris McGrew has shared a photo of WR 134—a variable Wolf-Rayet star about 6,000 light-years away from Earth in the constellation of Cygnus—which he captured from a dark sky location in southwestern New Mexico.

"The stellar winds are blowing out the blue shell of ionized oxygen gas visible in the middle of the image," McGrew said. "This is a deep sky object that has been imaged countless times, and I get why. Ever since I saw it for the first time, it's been high on my list. For years I didn’t have the skies or the time, but I finally got the chance to go after it."

Source: Chris McGrew

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It's a regrettable reality that there is never enough time to cover all the interesting scientific stories we come across each month. In the past, we've featured year-end roundups of cool science stories we (almost) missed. This year, we're experimenting with a monthly collection. June's list includes the final results from the Muon g-2 experiment, re-creating the recipe for Egyptian blue, embedding coded messages in ice bubbles, and why cats seem to have a marked preference for sleeping on their left sides.

Re-creating Egyptian blues

Artists in ancient Egypt were particularly fond of the color known as Egyptian blue—deemed the world's oldest synthetic pigment—since it was a cheap substitute for pricier materials like lapis lazuli or turquoise. But archaeologists have puzzled over exactly how it was made, particularly given the wide range of hues, from deep blue to gray or green. That knowledge had long been forgotten. However, scientists at Washington State University have finally succeeded in recreating the recipe, according to a paper published in the journal npj Heritage Science.

The interdisciplinary team came up with 12 different potential recipes using varying percentages of silicon dioxide, copper, calcium, and sodium carbonate. They heated the samples to 1,000° Celsius (about what ancient artists could have achieved), varying the time between one and 11 hours. They also cooled the samples at different rates. Then they analyzed the samples using microscopy and other modern techniques and compared them to the Egyptian blue on actual Egyptian artifacts to find the best match.

Their samples are now on display at the Carnegie Museum of Natural History in Pittsburgh. Apart from its historical interest, Egyptian blue also has fascinating optical, magnetic, and biological properties that could prove useful in practical applications today, per the authors. For instance, it might be used for counterfeit-proof inks, since it emits light in the near-infrared, and its chemistry is similar to high-temperature superconductors.

npj Heritage Science, 2025. DOI: 10.1038/s40494-025-01699-7  (About DOIs).

World’s smallest violin

It's an old joke, possibly dating back to the 1970s. Whenever someone is complaining about an issue that seems trivial in the grand scheme of things, it's tradition to rub one's thumb and forefinger together and declare, "This the world's smallest violin playing just for you." (In my snarky circles we used to say the violin was "playing 'My Heart Bleeds for You.'") Physicists at Loughborough University have now made what they claim really is the world's smallest violin, just 35 microns long and 13 microns wide.

There are various lithographic methods for creating patterned electronic devices, such as photolithography, which can be used either with a mask or without. The authors relied on scanning probe thermal lithography instead, specifically a cutting-edge nano-sculpting machine they dubbed the NanoFrazor. The first step was to coat a small chip with two layers of a gel material and then place it under the NanoFrazor. The instrument's heated tip burned the violin pattern into the gel. Then they "developed" the gel by dissolving the underlayer so that only a violin-shaped cavity remained.

Next, they poured on a thin layer of platinum and rinsed off the chip with acetone. The resulting violin is a microscopic image rather than a playable tiny instrument—you can't even see it without a microscope—but it's still an impressive achievement that demonstrates the capabilities of the lab's new nano lithography system. And the whole process can take as little as three hours.

Muon g-2 anomaly no more?

The Muon g-2 experiment (pronounced “gee minus two”) is designed to look for tantalizing hints of physics beyond the Standard Model of particle physics. It does this by measuring the magnetic field (aka the magnetic moment) generated by a subatomic particle known as the muon. Back in 2001, an earlier run of the experiment at Brookhaven National Laboratory found a slight discrepancy, hinting at possible new physics, but that controversial result fell short of the critical threshold required to claim discovery.

Physicists have been making new measurements ever since in hopes of resolving this anomaly. For instance, in 2021, we reported on data from the updated Muon g-2 experiment that showed "excellent agreement" with the discrepancy Brookhaven recorded. They improved on their measurement precision in 2023. And now it seems the anomaly is very close to being resolved, according to a preprint posted to the physics arXiv based on analysis of a data set triple the size as the one used for the 2023 analysis. (You can watch a video explanation here.)

The final Muon g-2 result is in agreement with the 2021 and 2023 results, but much more precise, with error bars four times smaller than those of the original Brookhaven experiment. Combine that with new predictions by the related Muon g-2 Theory Initiative using a new means of calculating the muon's magnetic moment, and the discrepancy between theoretical prediction and experiment narrows even further.

While some have declared victory, and the Muon g-2 experiment is completed, theorists are still sounding a note of caution as they seek to further refine their models. Meanwhile, Fermilab is building a new experiment designed to hunt for muon-to-electron conversions. If they find any, that would definitely comprise new physics beyond the Standard Model.

arXiv, 2025. DOI: 10.48550/arXiv.2506.03069 (About DOIs).

Message in a bubble

Forget sending messages in a bottle. Scientists have figured out how to encode messages in both binary and Morse code in air bubbles trapped in ice, according to a paper published in the journal Cell Physical Science. Trapped air bubbles are usually shaped like eggs or needles, and the authors discovered that they could manipulate the sizes, shapes, and distribution of those ice bubbles by varying the freezing rate. (Faster rates produce egg-shaped bubbles, slower rates produce needle-shaped ones, for example.)

To encode messages, the researchers assigned different bubble sizes, shapes, and orientations to Morse code and binary characters and used their freezing method to produce ice bubbles representing the desired characters. Next, they took a photograph of the ice layer and converted it to gray scale, training a computer to identify the position and the size of the bubbles and decode the message into English letters and Arabic numerals. The team found that binary coding could store messages 10 times longer than Morse code.

Someday, this freezing method could be used for short message storage in Antarctica and similar very cold regions where traditional information storage methods are difficult and/or too costly, per the authors. However, Qiang Tang of the University of Australia, who was not involved in the research, told New Scientist that he did not see much practical application for the breakthrough in cryptography or security, "unless a polar bear may want to tell someone something."

Cell Physical Science, 2025. DOI: 10.1016/j.xcrp.2025.102622 (About DOIs).

Cats prefer to sleep on left side

The Internet was made for cats, especially YouTube, which features millions of videos of varying quality, documenting the crazy antics of our furry feline friends. Those videos can also serve the interests of science, as evidenced by the international team of researchers who analyzed 408 publicly available videos of sleeping cats to study whether the kitties showed any preference for sleeping on their right or left sides. According to a paper published in the journal Current Biology, two-thirds of those videos showed cats sleeping on their left sides.

Why should this behavioral asymmetry be the case? There are likely various reasons, but the authors hypothesize that it has something to do with kitty perception and their vulnerability to predators while asleep (usually between 12 to 16 hours a day). The right hemisphere of the brain dominates in spatial attention, while the right amygdala is dominant for processing threats. That's why most species react more quickly when a predator approaches from the left. Because a cat's left visual field is processed in the dominant right hemisphere of their brains, "sleeping on the left side can therefore be a survival strategy," the authors concluded.

Current Biology, 2025. DOI: 10.1016/j.cub.2025.04.043 (About DOIs).

A mobile ultrasonic brain imaging helmet

Brain imaging is a powerful tool for both medical diagnosis and neuroscience research, from noninvasive methods like EEGs, MRI,  fMRI, and diffuse optical tomography, to more invasive techniques like intracranial EEG. But the dream is to be able to capture the human brain functioning in real-world scenarios instead of in the lab. Dutch scientists are one step closer to achieving that goal with a specially designed 3D-printed helmet that relies upon functional ultrasound imaging (fUSi) to enable high-quality 2D imaging, according to a paper published in the journal Science Advances.

Unlike fMRI, which requires subjects to remain stationary, the helmet monitors the brain as subjects are walking and talking (accompanied by a custom mobile fUSi acquisition cart). The team recruited two 30-something male subjects who had undergone cranioplasty to embed an implant made of polyetheretherketone (PEEK). While wearing the helmet, the subjects were asked to perform stationary motor and sensory tasks: pouting or brushing their lips, for example. Then the subjects walked in a straight line, pushing the cart for a minute up to 30 meters while licking their lips to demonstrate multitasking. The sessions ran over a 20-month period, thereby demonstrating that the helmet is suitable for long-term use. The next step is to improve the technology to enable mobile 3D imaging of the brain.

Science Advances, 2025. DOI: 10.1126/sciadv.adu9133  (About DOIs).

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The government needs to ensure that the grid can support a twenty-fold increase in compute capacity over the next five years - if it doesn’t figure it out, then the country could face slowed AI growth, increased costs, and reliance on less sustainable energy sources. The UK is not the only country focusing on energy needs. Within the last year, Microsoft came to a deal with Constellation Energy to reactivate the Three Mile Island nuclear reactor.

To properly address the needs of the AI industry, the government’s Energy and Technology secretaries are hosting the second meeting of the AI Energy Council, which will bring together tech firms such as Microsoft, Amazon Web Services, and Google, energy providers, the energy regulator Ofgem, and the National Energy System Operator (NESO).

The objective of the meeting is to forecast future energy needs, understand sector-specific AI adoption, and ensure grid preparedness.

Notably, since the first AI Energy Council in January, the UK government has been working more closely with Ofgem and the National Energy System Operator (NESO) to reform the country’s connection process. Ofgem still needs to sign off on these reforms but it could mean more than 400GW of additional capacity is freed up, which will help to power AI projects.

These AI Energy Council meetings are a smart initiative because it allows the government, regulator, energy companies, and tech firms to sort through the required changes face to face around the same table, as opposed to separate meetings taking place which would drastically slow everything down.

An interesting concept being introduced as part of the AI Opportunities Action Plan are AI Growth Zones. These will be designated areas around the country designed to support the AI industry. The government believes that these “hotbeds of AI development” will unlock billions of pounds worth of investment and create lots of new jobs all around the country, not just in London.

Councils from around the country have already started expressing their interest to the government in hosting these AI zones that will help to make those areas more prosperous thanks to the introduction of high-paying jobs.

While the development sounds nice, the government and local councils will also need to balance the plans with residents' welfare. Many of the proposed AI Growth Zones, which include Culham in Oxfordshire, Bristol, Cambridge, North West, Edinburgh, Merseyside, Loughton, Bridgend, Northumberland, will have plenty of people already in poverty.

While jobs will definitely help some of these people, the developments could lead to more demand for housing, pushing up rental prices, which would drastically affect people already struggling with the cost of living. Hopefully, there will be initiatives put in place to help protect these people such as access to welfare payments and reskilling opportunities to escape poverty.

These AI Energy Council meetings are aiming to ensure the UK can sustainably host AI data centres, however, if things go wonky, UK residents may also find themselves paying even higher energy (they’re already sky-high) due to the increased demand. The transition needs to be managed carefully and these AI Energy Council meetings are going a long way to ensure this.

Image via Depositphotos.com

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Stephen Hawking, a British physicist and arguably the most famous man suffering from amyotrophic lateral sclerosis (ALS), communicated with the world using a sensor installed in his glasses. That sensor used tiny movements of a single muscle in his cheek to select characters on a screen. Once he typed a full sentence at a rate of roughly one word per minute, the text was synthesized into speech by a DECtalk TC01 synthesizer, which gave him his iconic, robotic voice.

But a lot has changed since Hawking died in 2018. Recent brain-computer-interface (BCI) devices have made it possible to translate neural activity directly into text and even speech. Unfortunately, these systems had significant latency, often limiting the user to a predefined vocabulary, and they did not handle nuances of spoken language like pitch or prosody. Now, a team of scientists at the University of California, Davis has built a neural prosthesis that can instantly translate brain signals into sounds—phonemes and words. It may be the first real step we have taken toward a fully digital vocal tract.

Text messaging

“Our main goal is creating a flexible speech neuroprosthesis that enables a patient with paralysis to speak as fluently as possible, managing their own cadence, and be more expressive by letting them modulate their intonation,” says Maitreyee Wairagkar, a neuroprosthetics researcher at UC Davis who led the study. Developing a prosthesis ticking all these boxes was an enormous challenge because it meant Wairagkar’s team had to solve nearly all the problems BCI-based communication solutions have faced in the past. And they had quite a lot of problems.

The first issue was moving beyond text—most successful neural prostheses developed so far have translated brain signals into text—the words a patient with an implanted prosthesis wanted to say simply appeared on a screen. Francis R. Willett led a team at Stanford University that achieved brain-to-text translation with around a 25 percent error rate. “When a woman with ALS was trying to speak, they could decode the words. Three out of four words were correct. That was super exciting but not enough for daily communication,” says Sergey Stavisky, a neuroscientist at UC Davis and a senior author of the study.

Delays and dictionaries

One year after the Stanford work, in 2024, Stavisky’s team published its own research on a brain-to-text system that bumped the accuracy to 97.5 percent. “Almost every word was correct, but communicating over text can be limiting, right?” Stavisky said. “Sometimes you want to use your voice. It allows you to make interjections, it makes it less likely other people interrupt you—you can sing, you can use words that aren’t in the dictionary.” But the most common approach to generating speech relied on synthesizing it from text, which led straight into another problem with BCI systems: very high latency.

In nearly all BCI speech aids, sentences appeared on a screen after a significant delay, long after the patient finished stringing the words together in their mind. The speech synthesis part usually happened after the text was ready, which caused even more delay. Brain-to-text solutions also suffered from a limited vocabulary. The latest system of this kind supported a dictionary of roughly 1,300 words. When you tried to speak a different language, use more elaborate vocabulary, or even say the unusual name of a café just around the corner, the systems failed.

So, Wairagkar designed her prosthesis to translate brain signals into sounds, not words—and do it in real time.

Extracting sound

The patient who agreed to participate in Wairagkar’s study was codenamed T15 and was a 46-year-old man suffering from ALS. “He is severely paralyzed and when he tries to speak, he is very difficult to understand. I’ve known him for several years, and when he speaks, I understand maybe 5 percent of what he’s saying,” says David M. Brandman, a neurosurgeon and co-author of the study. Before working with the UC Davis team, T15 communicated using a gyroscopic head mouse to control a cursor on a computer screen.

To use an early version of Stavisky’s brain-to-text system, the patient had 256 microelectrodes implanted into his ventral precentral gyrus, an area of the brain responsible for controlling vocal tract muscles.

For the new brain-to-speech system, Wairagkar and her colleagues relied on the same 256 electrodes. “We recorded neural activities from single neurons, which is the highest resolution of information we can get from our brain,” Wairagkar says. The signal registered by the electrodes was then sent to an AI algorithm called a neural decoder that deciphered those signals and extracted speech features such as pitch or voicing. In the next step, these features were fed into a vocoder, a speech synthesizing algorithm designed to sound like the voice that T15 had when he was still able to speak normally. The entire system worked with latency down to around 10 milliseconds—the conversion of brain signals into sounds was effectively instantaneous.

Because Wairagkar’s neural prosthesis converted brain signals into sounds, it didn’t come with a limited selection of supported words. The patient could say anything he wanted, including pseudo-words that weren’t in a dictionary and interjections like “um,” “hmm,” or “uh.” Because the system was sensitive to features like pitch or prosody, he could also vocalize questions saying the last word in a sentence with a slightly higher pitch and even sing a short melody.

But Wairagkar’s prosthesis had its limits.

Intelligibility improvements

To test the prosthesis’s performance, Wairagkar’s team first asked human listeners to match a recording of some synthesized speech by the T15 patient with one transcript from a set of six candidate sentences of similar length. Here, the results were completely perfect, with the system achieving 100 percent intelligibility.

The issues began when the team tried something a bit harder: an open transcription test where listeners had to work without any candidate transcripts. In this second test, the word error rate was 43.75 percent, meaning participants identified a bit more than half of the recorded words correctly. This was certainly an improvement compared to the intelligibility of the T15’s unaided speech where the word error in the same test with the same group of listeners was 96.43 percent. But the prosthesis, while promising, was not yet reliable enough to use it for day-to-day communication.

“We’re not at the point where it could be used in open-ended conversations. I think of this as a proof of concept,” Stavisky says. He suggested that one way to improve future designs would be to use more electrodes. “There are a lot of startups right now building BCIs that are going to have over a thousand electrodes. If you think about what we’ve achieved with just 250 electrodes versus what could be done with a thousand or two thousand—I think it would just work,” he argued. And the work to make that happen is already underway.

Paradromics, a BCI-focused startup based in Austin, Texas, wants to go ahead with clinical trials of a speech neural prosthesis and is already seeking FDA approval. “They have a 1,600 electrode system, and they publicly stated they are going to do speech,” Stavisky says. “David Brandman, our co-author, is going to be the lead principal investigator for these trials, and we’re going to do it here at UC Davis.”

Nature, 2025.  DOI: 10.1038/s41586-025-09127-3

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(Image credit: ITHome)

Before Duolingo wiped its videos from TikTok and Instagram in mid-May, social media engagement was one of the language-learning app’s most recognizable qualities. Its green owl mascot had gone viral multiple times and was well known to younger users—a success story other marketers envied.

But, when news got out that Duolingo was making the switch to become an “AI-first” company, planning to replace contractors who work on tasks generative AI could automate, public perception of the brand soured.

Young people started posting on social media about how they were outraged at Duolingo as they performatively deleted the app—even if it meant losing the precious streak awards they earned through continued, daily usage. The comments on Duolingo’s TikTok posts in the days after the announcement were filled with rage, primarily focused on a single aspect: workers being replaced with automation.

The negative response online is indicative of a larger trend: Right now, though a growing number of Americans use ChatGPT, many people are sick of AI’s encroachment into their lives and are ready to fight back.

When reached for comment, Duolingo spokesperson Sam Dalsimer stressed that “AI isn’t replacing our staff” and said all AI-generated content on the platform would be created “under the direction and guidance of our learning experts.” The company's plan is still to reduce its use of non-staff contractors for tasks that can be automated using generative AI.

Duolingo’s embrace of workplace automation is part of a broad shift within the tech industry. Leaders at Klarna, a buy now, pay later service, and Salesforce, a software company, have also made sweeping statements about AI reducing the need for new hires in roles like customer service and engineering. These decisions were being made at the same time as developers sold “agents,” which are designed to automate software tasks, as a way to reduce the amount of workers needed to complete certain tasks.

Still, the potential threat of bosses attempting to replace human workers with AI agents is just one of many compounding reasons people are critical of generative AI. Add that to the error-ridden outputs, the environmental damage, the potential mental health impacts for users, and the concerns about copyright violations when AI tools are trained on existing works.

Many people were initially in awe of ChatGPT and other generative AI tools when they first arrived in late 2022. You could make a cartoon of a duck riding a motorcycle! But soon artists started speaking out, noting that their visual and textual works were being scraped to train these systems. The pushback from the creative community ramped up during the 2023 Hollywood writer's strike, and continued to accelerate through the current wave of copyright lawsuits brought by publishers, creatives, and Hollywood studios.

Right now, the general vibe aligns even more with the side of impacted workers. “I think there is a new sort of ambient animosity towards the AI systems,” says Brian Merchant, former WIRED contributor and author of Blood in the Machine, a book about the Luddites rebelling against worker-replacing technology. “AI companies have speedrun the Silicon Valley trajectory.”

Before ChatGPT’s release, around 38 percent of US adults were more concerned than excited about increased AI usage in daily life, according to the Pew Research Center. The number shot up to 52 percent by late 2023, as the public reacted to the speedy spread of generative AI. The level of concern has hovered around that same threshold ever since.

Ethical AI researchers have long warned about the potential negative impacts of this technology. The amplification of harmful stereotypes, increased environmental pollution, and potential displacement of workers are all widely researched and reported. These concerns were often previously reserved to academic discourse and online leftists paying attention to labor issues.

As AI outputs continued to proliferate, so did the cutting jokes. Alex Hanna, coauthor of The AI Con and director of research at the Distributed AI Research Institute, mentions how people have been “trolling” in the comment sections of YouTube Shorts and Instagram Reels whenever they see AI-generated content in their feeds. “I've seen this on the web for a while,” she says.

This generalized animosity towards AI has not abated over time. Rather, it’s metastasized. LinkedIn users have complained about being constantly prompted with AI-generated questions. Spotify listeners have been frustrated to hear AI-generated podcasts recapping their top-listened songs. Reddit posters have been upset to see AI-generated images on their microwavable noodles at the grocery store.

Tensions are so high that even the suspicion of AI usage is now enough to draw criticism. I wouldn’t be surprised if social media users screenshotted the em dashes in this piece—a supposed giveaway of AI-generated text outputs—and cast suspicions about whether I used a chatbot to spin up sections of the article.

A few days after I first contacted Duolingo for comment, the company hid all of its social media videos on TikTok and Instagram. But, soon the green owl was back online with a satirical post about conspiracy theories. “I’ve had it with the CEOs and those in power. It’s time we show them who’s in charge,” said a person wearing a three-eyed Duolingo mask. The video uploaded right afterwards was a direct message from the company’s CEO attempting to explain how humans would still be working at Duolingo, but AI could help them produce more language learning courses.

While the videos got millions of views on TikTok, the top comments continued to criticize Duolingo for AI-enabled automation: “Keep in mind they are still using AI for their lessons, this doesn’t change anything.”

This frustration over AI’s steady creep has breached the container of social media and started manifesting more in the real world. Parents I talk to are concerned about AI use impacting their child’s mental health. Couples are worried about chatbot addictions driving a wedge in their relationships. Rural communities are incensed that the newly built data centers required to power these AI tools are kept humming by generators that burn fossil fuels, polluting their air, water, and soil. As a whole, the benefits of AI seem esoteric and underwhelming while the harms feel transformative and immediate.

Unlike the dawn of the internet where democratized access to information empowered everyday people in unique, surprising ways, the generative AI era has been defined by half-baked software releases and threats of AI replacing human workers, especially for recent college graduates looking to find entry-level work.

“Our innovation ecosystem in the 20th century was about making opportunities for human flourishing more accessible,” says Shannon Vallor, a technology philosopher at the Edinburgh Futures Institute and author of The AI Mirror, a book about reclaiming human agency from algorithms. “Now, we have an era of innovation where the greatest opportunities the technology creates are for those already enjoying a disproportionate share of strengths and resources.”

Not only are the rich getting richer during the AI era, but many of the technology’s harms are falling on people of color and other marginalized communities. “Data centers are being located in these really poor areas that tend to be more heavily Black and brown,” Hanna says. She points out how locals have not just been fighting back online, but have also been organizing even more in-person to protect their communities from environmental pollution. We saw this in Memphis, Tennessee, recently, where Elon Musk’s artificial intelligence company xAI is building a large data center with over 30 methane-gas-powered generators that are spewing harmful exhaust.

The impacts of generative AI on the workforce are another core issue that critics are organizing around. “Workers are more intuitive than a lot of the pundit class gives them credit for,” says Merchant. “They know this has been a naked attempt to get rid of people.” The next major shift in public opinion will likely follow previous patterns, occurring when broad swaths of workers feel further threatened and organize in response. And this time, the in-person protests may be just as big as the online backlash.

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Some of the most ingenious tech has been inspired by nature. From color-changing materials that function like cephalopod skin to a tiny biomimetic robot that looks and moves like an actual cockroach, the extraordinary adaptations of some organisms have upgraded our technological capabilities. Now the octopus is lending an arm—or a sucker.

Octopus tentacles have remarkably strong suckers with an adhesion power that could be an asset to soft robots that need to pick things up and hold onto them. Existing artificial suction cups have trouble with irregular surfaces such as rocks and shells. Cephalopods such as octopuses and squid have evolved biological suckers that can adapt to each surface and attach to them. This is why a team of researchers at the University of Bristol, led by Tianqi Yue, have created robotic suckers that are closer to the real thing than ever.

One reason biological suckers have an edge is mucus secretion, better enabling them to stick on an irregular surface. While robotic suckers can’t exactly go there, Yue figured out a way for them to use water instead of mucus.

“Organisms dexterously deform their soft body to make a rough shape conformation on the substrate,” Yue and his team said in a study recently published in PNAS. “They then use their in-sucker mechanoreceptors to perceive the suction leakage and secrete an appropriate amount of mucus to form an effective mucus seal.”

So, you want to be an octopus?

Suckers on the arms of an octopus grip things when their mechanoreceptor cells, which detect stimuli such as the texture of a surface, send a message to its brain that tells the animal how the sucker should deform to adhere to that surface with as little leakage as possible. Mechanoreceptors also tell the suckers how much mucus to produce for optimal grip. Muscles contract to reduce water pressure inside the sucker. An octopus can detach from an object by having its muscles release tension.

This isn’t the first time suction cups were inspired by highly adaptive octopus suckers. Some models have used pressurized chambers meant to push against a surface and conform to it. Others have focused more on matching the morphology of a biological sucker. This has included giving the suckers microdenticles, the tiny tooth-like projections on octopus suckers that give them a stronger grip.

Previous methods of artificial conformation have had some success, but they could be prone to leakage from gaps between the sucker and the surface it is trying to stick to, and they often needed vacuum pumps to operate. Yue and his team created a sucker that was morphologically and mechanically similar to that of an octopus.

Suckers are muscular structures with an extreme flexibility that helps them conform to objects without leakage, contract when gripping objects, and release tension when letting them go. This inspired the researchers to create suckers from a silicone sponge material on the inside and a soft silicone pad on the outside.

For the ultimate biomimicry, Yue thought that the answer to the problems experienced with previous models was to come up with a sucker that simulated the mucus secretion of octopus suckers.

This really sucks

Cephalopod suction was previously thought to be a product of these creatures’ soft, flexible bodies, which can deform easily to adapt to whatever surface it needs to grip. Mucus secretion was mostly overlooked until Yue decided to incorporate it into his robo-suckers.

Mollusk mucus is known to be five times more viscous than water. For Yue’s suckers, an artificial fluidic system, designed to mimic the secretions released by glands on a biological sucker, creates a liquid seal between the sucker and the surface it is adhering to, just about eliminating gaps. It might not have the strength of octopus slime, but water is the next best option for a robot that is going to be immersed in water when it goes exploring, possibly in underwater caves or at the bottom of the ocean.

Even without actual mucus, suction cups with a water seal have been found to hang onto things 55 times longer than those without.

There is the issue of gaps between the sucker and the surface it sticks to. The larger the gaps, the faster the sucker will lose its grip. The artificial suckers first try to conform to a surface mechanically as much as possible. While this should make any gaps small, those gaps are then sealed by the artificial fluidic system. A syringe would pump air through a tube connected directly to the suction cup so it could be reset for every trial.

When faced with challenging surfaces, such as rocks and plastic figures with rough textures and many curves, the silicone sucker on its robotic arm was able to conform to them and hold its grip for long periods of time with barely any leakage.

“[Our] suction mechanism demonstrates the great potential of liquid regulation in improving suction adaptation and shows strong adaptive suction on challenging complex dry surfaces,” the researchers said. “It enables a unique, low-cost, clean and powerful soft adhesion strategy for next-generation robots.”

Now that technology has created such eerily realistic suckers, watch out for entire tentacles full of them.

PNAS 2025. DOI: 10.1073/pnas.2314359121

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Welcome to Edition 7.50 of the Rocket Report! We're nearly halfway through the year, and it seems like a good time to look back on the past six months. What has been most surprising to me in the world of rockets? First, I didn't expect SpaceX to have this much trouble with Starship Version 2. Growing pains are normal for new rockets, but I expected the next big hurdles for SpaceX to clear with Starship to be catching the ship from orbit and orbital refueling, not completing a successful launch. The state of Blue Origin's New Glenn program is a little surprising to me. New Glenn's first launch in January went remarkably well, beating the odds for a new rocket. Now, production delays are pushing back the next New Glenn flights. The flight of Honda's reusable rocket hopper also came out of nowhere a few weeks ago.

As always, we welcome reader submissions. If you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets, as well as a quick look ahead at the next three launches on the calendar.

Isar raises 150 million euros. German space startup Isar Aerospace has obtained 150 million euros ($175 million) in funding from an American investment company, Reuters reports. The company, which specializes in satellite launch services, signed an agreement for a convertible bond with Eldridge Industries, it said. Isar says it will use the funding to expand its launch service offerings. Isar's main product is the Spectrum rocket, a two-stage vehicle designed to loft up to a metric ton (2,200 pounds) of payload mass to low-Earth orbit. Spectrum flew for the first time in March, but it failed moments after liftoff and fell back to the ground near its launch pad. Still, Isar became the first in a new crop of European launch startups to launch a rocket theoretically capable of reaching orbit.

Flush with cash ... Isar is leading in another metric, too. The Munich-based company has now raised more than 550 million euros ($642 million) from venture capital investors and government-backed funds. This far exceeds the fundraising achievements of any other European launch startup. But the money will only go so far before Isar must prove it can successfully launch a rocket into orbit. Company officials have said they aim to launch the second Spectrum rocket before the end of this year. (submitted by EllPeaTea)

Rocket Lab aiming for record turnaround. Rocket Lab demonstrated a notable degree of flexibility this week. Two light-class Electron rockets were nearing launch readiness at the company's privately owned spaceport in New Zealand, but one of the missions encountered a technical problem, and Rocket Lab scrubbed a launch attempt Tuesday. The spaceport has two launch pads next to one another, so while technicians worked to fix that problem, Rocket Lab slotted in another Electron rocket to lift off from the pad next door. That mission, carrying a quartet of small commercial signals intelligence satellites for HawkEye 360, successfully launched Thursday.

Giving it another go ... A couple of hours after that launch, Rocket Lab announced it was ready to try again with the mission it had grounded earlier in the week. "Can’t get enough of Electron missions? How about another one tomorrow? With our 67th mission complete, we’ve scheduled our next launch from LC-1 in less than 48 hours—Electron’s fastest turnaround from the same launch site yet!" Rocket Lab hasn't disclosed what satellite is flying on this mission, citing the customer's preference to remain anonymous for now.

You guessed it! Baguette One will launch from France. French rocket builder HyPrSpace will launch its Baguette One demonstrator from a missile testing site in mainland France, after signing an agreement with the country’s defense procurement agency, European Spaceflight reports. HyPrSpace was founded in 2019 to begin designing an orbital-class rocket named Orbital Baguette 1 (OB-1). The Baguette One vehicle is a subscale, single-stage suborbital demonstrator to prove out technologies for the larger satellite launcher, mainly its hybrid propulsion system.

Sovereign launch ... HyPrSpace's Baguette One will stand roughly 10 meters (30 feet) tall and will be capable of carrying payloads of up to 300 kilograms (660 pounds) to suborbital space. It is scheduled to launch next year from a French missile testing site in the south of France. "Gaining access to this dual-use launch pad in mainland France is a major achievement after many years of work on our hybrid propulsion technology," said Sylvain Bataillard, director general of HyPrSpace. "It’s a unique opportunity for HyPrSpace and marks a decisive turning point. We’re eager to launch Baguette One and to play a key role in building a more sovereign, more sustainable, and boldly innovative European dual-use space industry." (submitted by EllPeaTea)

Firefly moves closer to launching from Sweden. An agreement between the United States and Sweden brings Firefly Aerospace one step closer to launching its Alpha rocket from a Swedish spaceport, Space News reports. The two countries signed a technology safeguards agreement (TSA) at a June 20 ceremony at the Swedish embassy in Washington, DC. The TSA allows the export of American rockets to Sweden for launches there, putting in place measures to protect launch vehicle technology.

A special relationship ... The US government has signed launch-related safeguard agreements with only a handful of countries, such as Australia, the United Kingdom, and now Sweden. Rocket exports are subject to strict controls because of the potential military applications of that technology. Firefly currently launches its Alpha rocket from Vandenberg Space Force Base, California, and is building a launch site at Wallops Island, Virginia. Firefly also has a lease for a launch pad at Cape Canaveral, Florida, although the company is prioritizing other sites. Then, last year, Firefly announced an agreement with the Swedish Space Corporation to launch Alpha from Esrange Space Center as soon as 2026. (submitted by EllPeaTea)

Amazon is running strong out of the gate. For the second time in two months, United Launch Alliance sent a batch of 27 broadband Internet satellites into orbit for Amazon on Monday morning, Ars reports. This was the second launch of a full load of operational satellites for Amazon's Project Kuiper, a network envisioned to become a competitor to SpaceX's Starlink. Just like the last flight on April 28, an Atlas V rocket lifted off from Cape Canaveral, Florida, and delivered Amazon's satellites into an on-target orbit roughly 280 miles (450 kilometers) above Earth.

Time to put up or shut up ... After lengthy production delays at Amazon's satellite factory, the retail giant is finally churning out Kuiper satellites at scale. Amazon has already shipped the third batch of Kuiper satellites to Florida to prepare for launch on a SpaceX Falcon 9 rocket next month. ULA won the lion's share of Amazon's multibillion-dollar launch contract in 2022, committing to up to 38 Vulcan launches for Kuiper and nine Atlas V flights. Three of those Atlas Vs have now launched. Amazon also reserved 18 launches on Europe's Ariane 6 rocket, and at least 12 on Blue Origin's New Glenn. Vulcan, Ariane 6, and New Glenn have only flown one or two times, and Amazon is asking them to quickly ramp up their cadence to deliver 3,232 Kuiper satellites to orbit in the next few years. The handful of Falcon 9s and Atlas Vs that Amazon has on contract are the only rockets in the bunch with a proven track record. With Kuiper satellites now regularly shipping out of the factory, any blame for future delays may shift from Amazon to the relatively unproven rockets it has chosen to launch them.

Falcon 9 launches with four commercial astronauts. Retired astronaut Peggy Whitson, America's most experienced space flier, and three rookie crewmates from India, Poland, and Hungary blasted off on a privately financed flight to the International Space Station early Wednesday, CBS News reports. This is the fourth non-government mission mounted by Houston-based Axiom Space. The four commercial astronauts rocketed into orbit on a SpaceX Falcon 9 launcher from NASA's Kennedy Space Center in Florida, and their Dragon capsule docked at the space station Thursday to kick off a two-week stay.

A brand-new Dragon ... The Crew Dragon spacecraft flown on this mission, serial number C213, is the fifth and final addition to SpaceX's fleet of astronaut ferry ships built for NASA trips to the space station and for privately funded commercial missions to low-Earth orbit. Moments after reaching orbit Wednesday, Whitson revealed the name of the new spacecraft: Crew Dragon Grace. "We had an incredible ride uphill, and now we'd like to set our course for the International Space Station aboard the newest member of the Dragon fleet, our spacecraft named Grace. ... Grace reminds us that spaceflight is not just a feat of engineering, but an act of goodwill to the benefit of every human everywhere."

How soon until Ariane 6 is flying regularly? It'll take several years for Arianespace to ramp up the launch cadence of Europe's new Ariane 6 rocket, Space News reports. David Cavaillolès, chief executive of Arianespace, addressed questions at the Paris Air Show about how quickly Arianespace can reach its target of launching 10 Ariane 6 rockets per year. "We need to go to 10 launches per year for Ariane 6 as soon as possible," he said. "It’s twice as more as for Ariane 5, so it’s a big industrial change." Two Ariane 6 rockets have launched so far, and a third mission is on track to lift off in August. Arianespace's CEO reiterated earlier plans to conduct four more Ariane 6 launches through the end of this year, including the first flight of the more powerful Ariane 64 variant with four solid rocket boosters.

Not a heavy lift ... Arianespace's target flight rate of 10 Ariane 6 rockets per year is modest compared to other established companies with similarly sized launch vehicles. United Launch Alliance is seeking to launch as many as 25 Vulcan rockets per year. Blue Origin's New Glenn is designed to eventually fly often, although the company hasn't released a target launch cadence. SpaceX, meanwhile, aims to launch up to 170 Falcon 9 rockets this year. But European governments are perhaps more committed than ever to maintaining a sovereign launch capability for the continent, so Ariane 6 isn't going away. Arianespace has sold more than 30 Ariane 6 launches, primarily to European institutional customers and Amazon.

SLS booster blows its nozzle. NASA and Northrop Grumman test-fired a new solid rocket booster in Utah on Thursday, and it didn't go exactly according to plan, Ars reports. This booster features a new design that NASA would use to power Space Launch System rockets, beginning with the ninth mission, or Artemis IX. The motor tested on Thursday isn't flight-worthy. It's a test unit that engineers will use to learn about the rocket's performance. It turns out they did learn something, but perhaps not what they wanted. About 1 minute and 40 seconds into the booster's burn, a fiery plume emerged from the motor's structure just above its nozzle. Moments later, the nozzle violently disintegrated. The booster kept firing until it ran out of pre-packed solid propellant.

A questionable future ... NASA's Space Launch System appears to have a finite shelf life. The Trump administration wants to cancel it after just three launches, while the preliminary text of a bill making its way through Congress would extend it to five flights. But chances are low the Space Launch System will make it to nine flights, and if it does, it's questionable if it would reach that point before 2040. The SLS rocket is a core piece of NASA's plan to return US astronauts to the Moon under the Artemis program, but the White House seeks to cancel the program in favor of cheaper commercial alternatives.

NASA conducts a low-key RS-25 engine test. The booster ground test on Thursday was the second time in less than a week that NASA test-fired new propulsion hardware for the Space Launch System. Last Friday, June 20, NASA ignited a new RS-25 engine on a test stand at Stennis Space Center in Mississippi. The hydrogen-fueled engine is the first of its kind to be manufactured since the end of the space shuttle program. This particular RS-25 engine is assigned to power the fifth launch of the SLS rocket, a mission known as Artemis V, that may end up never flying. While NASA typically livestreams engine tests at Stennis, the agency didn't publicize this event ahead of time.

It has been 10 years ... The SLS rocket was designed to recycle leftover parts from the space shuttle program, but NASA will run out of RS-25 engines after the rocket's fourth flight and will exhaust its inventory of solid rocket booster casings after the eighth flight. Recognizing that shuttle-era parts will eventually run out, NASA signed a contract with Aerojet Rocketdyne (now L3Harris) to set the stage for the production of new RS-25 engines in 2015. NASA later ordered an initial batch of six RS-25 engines from Aerojet, then added 18 more to the order in 2020, at a price of about $100 million per engine. Finally, a brand-new flight-worthy RS-25 engine has fired up on a test stand. If the Trump administration gets its way, these engines will never fly. Maybe that's fine, but after so long with so much taxpayer investment, last week's test milestone is worth publicizing, if not celebrating.

SpaceX finds itself in a dustup on the border. President Claudia Sheinbaum of Mexico is considering taking legal action after one of SpaceX's giant Starship rockets disintegrated in a giant fireball earlier this month as it was being fueled for a test-firing of its engines, The New York Times reports. No one was injured in the explosion, which rained debris on the beaches of the northern Mexican state of Tamaulipas. The conflagration occurred at a test site SpaceX operates a few miles away from the Starship launch pad. This test facility is located next to the Rio Grande River, just a few hundred feet from Mexico. The power of the blast sent wreckage flying across the river into Mexican territory.

Collision course ..."We are reviewing everything related to the launching of rockets that are very close to our border," Sheinbaum said at a news conference Wednesday. If SpaceX violated any international laws, she added, "we will file any necessary claims." Sheinbaum's leftist party holds enormous sway around Mexico, and the Times reports she was responding to calls to take action against SpaceX amid a growing outcry among scientists, regional officials, and environmental activists over the impact that the company's operations are having on Mexican ecosystems. SpaceX, on the other hand, said its efforts to recover debris from the Starship explosion have been "hindered by unauthorized parties trespassing on private property." SpaceX said it requested assistance from the government of Mexico in the recovery and added that it offered its own resources to help with the cleanup.

Next three launches

June 28: Falcon 9 | Starlink 10-34 | Cape Canaveral Space Force Station, Florida | 04:26 UTC

June 28: Electron | "Symphony in the Stars" | Māhia Peninsula, New Zealand | 06:45 UTC

June 28: H-IIA | GOSAT-GW | Tanegashima Space Center, Japan | 16:33 UTC

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A little less than four years from now, a killer asteroid will narrowly fly past planet Earth. This will be a celestial event visible around the world—for a few weeks, Apophis will shine among the brightest objects in the night sky.

The near miss by the large Apophis asteroid in April 2029 offers NASA a golden—and exceedingly rare—opportunity to observe such an object like this up close. Critically, the interaction between Apophis and Earth's gravitational pull will offer scientists an unprecedented chance to study the interior of an asteroid.

This is fascinating for planetary science, but it also has serious implications for planetary defense. In the future, were such an asteroid on course to strike Earth, an effective plan to deflect it would depend on knowing what the interior looks like.

"This is a remarkable opportunity," said Bobby Braun, who leads space exploration for the Johns Hopkins Applied Physics Laboratory, in an interview. "From a probability standpoint, there’s not going to be another chance to study a killer asteroid like this for thousands of years. Sooner or later, we’re going to need this knowledge."

But we may not get it.

NASA has some options for tracking Apophis during its flyby. However, the most promising of these, a mission named OSIRIS-Apex that breathes new life into an old spacecraft that otherwise would drift into oblivion, is slated for cancellation by the Trump White House's budget for fiscal year 2026.

Other choices, including dragging dual space probes out of storage, the Janus spacecraft, and other concepts that were submitted to NASA a year ago as part of a call for ideas, have already been rejected or simply left on the table. As a result, NASA currently has no plans to study what will be the most important asteroid encounter since the formation of the space agency.

"The world is watching," said Richard Binzel, an asteroid expert at the Massachusetts Institute of Technology. "NASA needs to step up and do their job."

But will they?

A short history of planetary defense

For decades, nearly every public survey asking what NASA should work on has rated planetary defense at or near the very top of the space agency's priorities. Yet for a long time, no part of NASA actually focused on finding killer asteroids or developing the technology to deflect them.

In authorization bills dating back to 2005, Congress began mandating that NASA "detect, track, catalog, and characterize" near-Earth objects that were 140 meters in diameter or larger. Congress established a goal of finding 90 percent of these by the year 2020. (We've blown past that deadline, obviously.)

NASA had been informally studying asteroids and comets for decades but did not focus on planetary defense until 2016, when the space agency established the Planetary Defense Coordination Office. In the decade since, NASA has made some progress, identifying more than 26,000 near-Earth objects, which are defined as asteroids and comets that come within 30 million miles of our planet's orbit.

Moreover, NASA has finally funded a space mission designed specifically to look for near-Earth threats, NEO Surveyor, a space telescope with the goal of "finding asteroids before they find us." The $1.2 billion mission is due to launch no earlier than September 2027.

NASA also funded the DART mission, which launched in 2021 and impacted a 160-meter asteroid named Dimorphous a year later to demonstrate the ability to make a minor deflection.

But in a report published this week, NASA's Office of Inspector General found that despite these advances, the space agency's approach to planetary defense still faces some significant challenges. These include a lack of resources, a need for better strategic planning, and competition with NASA's more established science programs for limited funding.

A comprehensive plan to address planetary defense must include two elements, said Ed Lu, a former NASA astronaut who co-founded the B612 Foundation to protect Earth from asteroid impacts.

The first of these is the finding and detection of asteroid threats. That is being addressed both by the forthcoming NEO Surveyor and the recently completed Vera C. Rubin Observatory, which is likely to find thousands of new near-Earth threats. The challenge in the coming years will be processing all of this data, calculating orbits, and identifying threats. Lu said NASA must do a better job of being transparent in how it makes these calculations.

The second thing Lu urged NASA to do is develop a follow-up mission to DART. It was successful, he said, but DART was just an initial demonstration. Such a capability needs to be tested against a larger asteroid with different properties.

An asteroid that might look a lot like Apophis.

About Apophis

Astronomers using a telescope in Arizona found Apophis in 2004, and they were evidently fans of the television series Stargate SG-1, in which a primary villain who threatens civilization on Earth is named Apophis.

Because of its orbit, Apophis comes near Earth about every eight years. It is fairly large, about 370 meters across. This is not big enough to wipe out civilization on Earth, but it would cause devastating consequences across a large region, imparting about 300 times as much impact force on the planet as the Tunguska event in 1908, over Siberia. It will miss Earth by about 31,600 km (19,600 miles) on April 13, 2029.

"We like to say that’s because nature has a sense of humor," said Binzel, the MIT asteroid scientist, of this date.

Astronomers estimate that an asteroid this large comes this close to Earth only about once every 7,500 years. It also appears to be a stony, non-metallic type of asteroid known as an ordinary chondrite. This is the most common type of asteroid in the Solar System.

Areas of the planet that will be able to see Apophis at its closest approach to Earth in April 2029.

Credit: Rick Binzel

All of this is rather convenient for scientists hoping to understand more about potential asteroids that might pose a serious threat to the planet.

The real cherry on top with the forthcoming encounter is that Apophis will be perturbed by Earth's gravitational pull.

"Nature is handing us an incredibly rare experiment where the Earth’s gravity is going to tug and stretch this asteroid," Binzel said. "By seeing how the asteroid responds, we’ll know how it is put together, and knowing how an asteroid is put together is maybe the most important information we could have if humanity ever faces an asteroid threat."

In nearly seven decades of spaceflight, humans have only ever probed the interior of three celestial bodies: the Earth, the Moon, and Mars. We're now being offered the opportunity to probe a fourth, right on our doorstep.

But time is ticking.

Chasing Apophis

On paper, at least, NASA has a plan to rendezvous with Apophis. About three years ago, after a senior-level review, NASA extended the mission of the OSIRIS-REx spacecraft to rendezvous with Apophis.

As you may recall, this oddly named spacecraft collected a sample from another asteroid, Bennu, in October 2020. Afterward, a small return capsule departed from the main spacecraft and made its way back to Earth. Since then, an $800 million spacecraft specifically designed to fly near and touch an asteroid has been chilling in space.

So it made sense when NASA decided to fire up the mission, newly rechristened OSIRIS-Apex, and re-vector it toward Apophis. It has been happily flying toward such a rendezvous for a few years. The plan was for Apex to catch up to Apophis shortly after its encounter with Earth and study it for about 18 months.

“The most cost-efficient thing you can do in spaceflight is continue with a heathy spacecraft that is already operating in space," Binzel said.

And that was the plan until the Trump administration released its budget proposal for fiscal year 2026. In its detailed budget information, the White House provided no real rationale for the cancellation, simply stating, "Operating missions that have completed their prime missions (New Horizons and Juno) and the follow-on mission to OSIRIX-REx, OSIRIS-Apophis Explorer, are eliminated."

It's unclear how much of a savings this resulted in. However, Apex is a pittance in NASA's overall budget. The operating funds to keep the mission alive in 2024, for example, were $14.5 million. Annual costs would be similar through the end of the decade. This is less than one-thousandth of NASA's budget, by the way.

"Apex is already on its way to reach Apophis, and to turn it off would be an incredible waste of resources," Binzel said.

Congress, of course, ultimately sets the budget. It will have the final say. But it's clear that NASA's primary mission to study a once-in-a-lifetime asteroid is at serious risk.

So what are the alternatives?

Going international and into the private sector

NASA was not the only space agency targeting Apophis. Nancy Chabot, a planetary scientist at the Johns Hopkins University Applied Physics Laboratory, has been closely tracking other approaches.

The European Space Agency has proposed a mission named Ramses to rendezvous with the asteroid and accompany it as it flies by Earth. This mission would be valuable, conducting a thorough before-and-after survey of the asteroid’s shape, surface, orbit, rotation, and orientation.

It would need to launch by April 2028. Recognizing this short deadline, the space agency has directed European scientists and engineers to begin preliminary work on the mission. But a final decision to proceed and commit to the mission will not be made before the space agency's ministerial meeting in November.

Artist's impression of ESA's Rapid Apophis Mission for Space Safety (Ramses).

Credit: ESA

This is no sure thing. For example, Chabot said, in 2016, the Asteroid Impact Mission was expected to advance before European ministers decided not to fund it. It is also not certain that the Ramses mission would be ready to fly in less than three years, a short timeline for planetary science missions.

Japan's space agency, JAXA, is also planning an asteroid mission named Destiny+ that has as its primary goal flying to an asteroid named 3200 Phaeton. The mission has been delayed multiple times, so its launch is now being timed to permit a single flyby of Apophis in February 2029 on the way to its destination. While this mission is designed to deliver quality science, a flyby mission provides limited data. It is also unclear how close Destiny+ will actually get to Apophis, Chabot said.

There are also myriad other concepts, commercial and otherwise, to characterize Apophis before, during, and after its encounter with Earth. Ideally, scientists say, a mission would fly to the asteroid before April 2029 and scatter seismometers on the surface to collect data.

But all of this would require significant funding. If not from NASA, who? The uncertain future of NASA's support for Apex has led some scientists to think about philanthropy.

For example, NASA's Janus spacecraft have been mothballed for a couple of years, but they could be used for observational purposes if they had—say—a Falcon 9 to launch them at the appropriate time.

A new, private reconnaissance mission could probably be developed for $250 million or less, industry officials told Ars. There is still enough time, barely, for a private group to work with scientists to develop instrumentation that could be added to an off-the-shelf spacecraft bus to get out to Apophis before its Earth encounter.

Private astronaut Jared Isaacman, who has recently indicated a willingness to support robotic exploration in strategic circumstances, confirmed to Ars that several people have reached out about his interest in financially supporting an Apophis mission. “I would say that I’m in info-gathering mode and not really rushing into anything,” Isaacman said.

The problem is that, at this very moment, Apophis is rushing this way.

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Regeneration is a trick many animals, including lizards, starfish, and octopuses, have mastered. Axolotls, a salamander species originating in Mexico, can regrow pretty much everything from severed limbs, through eyes and parts of brain, to the spinal cord. Mammals, though, have mostly lost this ability somewhere along their evolutionary path. Regeneration persisted, in a limited number of tissues, in just a few mammalian species like rabbits or goats.

“We were trying to learn how certain animals lost their regeneration capacity during evolution and then put back the responsible gene or pathway to reactivate the regeneration program,” says Wei Wang, a researcher at the National Institute of Biological Sciences in Beijing. Wang’s team has found one of those inactive regeneration genes, activated it, and brough back a limited regeneration ability to mice that did not have it before.

Of mice and bunnies

The idea Wang and his colleagues had was a comparative study to compare how the wound healing process works in regenerating and non-regenerating mammalian species. They chose rabbits as their regenerating mammals and mice as the non-regenerating species. As the reference organ, the team picked the ear pinna. “We wanted relatively simple structure that was easy to observe and yet composed of many different cell types,” Wang says. The test involved punching holes in the ear pinna of rabbits and mice and tracking the wound-repairing process.

The healing process began in the same way in rabbits and mice. Within the first few days after the injury, a blastema—a mass of heterogeneous cells—formed at the wound site. “Both rabbits and mice will heal the wounds after a few days,” Wang explains. “But between the 10th and 15th day, you will see the major difference.” In this timeframe, the earhole in rabbits started to become smaller. There were outgrowths above the blastema—the animals were producing more tissue. In mice, on the other hand, the healing process halted completely, leaving a hole in the ear.

Wang’s team compared the highly active genes in both rabbits and mice after injury and traced the roots of this difference to a gene called Aldh1a2, which was strongly activated in rabbits and remained inactive in mice.

The regrowth acid

The Aldh1a2 gene triggers the production of retinoic acid, a substance derived from vitamin A. Retinoic acid is crucial for cell positioning, growth, and specialization in embryos. Wang’s team noticed that the retinoic acid in rabbits was directing the cells to form new ear pinna tissues. “Mice, on the other hand, had very high activity in genetic pathways responsible for degradation of retinoic acid and very low activity in pathways responsible for synthesizing it,” Wang says. So, to test if the lack of retinoic acid really was the factor blocking the regeneration in mice, the team simply injected it into the wounded ears of mice. And it worked.

Mice that received regular injections with retinoic acid managed to fully regenerate ear pinna tissues just like the rabbits did. That was a bit surprising, since injecting retinoic acid to trigger the regeneration of the ear pinna punch wounds in mice has been tried before by a Polish research team without success in 2022. “I think the concentration of the acid they injected there was not high enough and the duration of these injections was not long enough,” Wang says. “Retinoic acid has a very short life.”

Once the regenerative magic of retinoic acid was confirmed, the team went on to test whether they had found the right gene. To do that, checked the rabbit genome for regions of DNA that could increase the activity of Aldh1a2. These were put near the mouse version of the gene to determine if they drove activity up to the levels observed in rabbits. This also worked well—the modified Aldh1a2 gene enabled the mice to produce their own retinoic acid and use it for complete regeneration of ear pinna.

That said, we’re still rather far away from making regeneration pills that would let us regrow lost limbs and organs like axolotls.

Piece of a puzzle

The first problem is the mechanisms responsible for regeneration are extremely complex and Wang’s team study uncovered just one piece of a huge puzzle. The first unanswered question is whether the gene Wang and his colleagues identified in their study is universal to all organs, or specific to just the ear pinna. “Adding back the retinoic acid can activate ear pinna regeneration but may not be able to activate the regeneration of heart or other organs,” Wang acknowledged. “We need to test that but at this moment we don’t know.” He said that all organs have their own distinct evolutionary history and may have lost the ability to regenerate for different reasons.

Regeneration, on the face of it, seems like a very useful thing, yet most mammals have lost their ability to regenerate. Wang’s team wants to understand the reason why the regeneration genes, still buried deep in the mammalian genome, were switched off in the first place, before attempting to switch them back on. “We don’t know what was the ecological driving force that led to the loss of regeneration ability in most mammals. What was the advantage? We are trying to figure this out,” Wang said.

Science, 2025. DOI: 10.1126/science.adp0176

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Battery electrode materials need to do a lot of things well. They need to be conductors to get charges to and from the ions that shuttle between the electrodes. They also need to have an open structure that allows the ions to move around before they reach a site where they can be stored. The storage of lots of ions also causes materials to expand, creating mechanical stresses that can cause the structure of the electrode material to gradually decay.

Because it's hard to get all of these properties from a single material, many electrodes are composite materials, with one chemical used to allow ions into and out of the electrode, another to store them, and possibly a third that provides high conductivity. Unfortunately, this can create new problems, with breakdowns at the interfaces between materials slowly degrading the battery's capacity.

Now, a team of researchers is proposing a material that seemingly does it all. It's reasonably conductive, it allows lithium ions to move around and find storage sites, and it's made of cheap and common elements. Perhaps best of all, it undergoes self-healing, smoothing out damage across charge/discharge cycles.

High capacity

The research team, primarily based in China, set out to limit the complexity of cathodes. "Conventional composite cathode designs, which typically incorporate a cathode active material, catholyte, and electronic conducting additive, are often limited by the substantial volume fraction of electrochemically inactive components," the researchers wrote. The solution, they reasoned, was to create an all-in-one material that gets rid of most of these materials.

A number of papers had reported good luck with chlorine-based chemicals, which allowed ions to move readily through the material but didn't conduct electricity very well. So the researchers experimented with pre-loading one of these materials with lithium. And they focused on iron chloride since it's a very cheap material.

The researchers ultimately targeted a material with the formula Li_1.3Fe_1.2Cl₄. Simulations showed that it would form a material that places the iron and chloride at the center of structures that look like two four-sided pyramids placed with their bases facing each other (gamers would recognize this as a d8). Each of these had a variable number of lithium atoms at each of the corners of these structures, and molecular simulations showed that lithium ions could readily move between these locations, allowing the material to shuffle ions around rapidly. These locations also give the ions a place to sit when stored.

Making it involved creating a mix of lithium chloride and two different formulations of iron chloride. They were pulverized and mixed by rapid rotation with a bunch of solid balls, and the pulverized mixture was then heated overnight at 200°C. The result was a material that could be incorporated into batteries.

When put to use in a test setup, the material had a similar energy density to iron phosphate cathodes, which are noted more for their durability than energy density. Somewhat unusually, it actually maintained more of its capacity when charging at higher rates (most materials do better at a slower rate of charge). And it was quite durable, retaining over 90 percent of its capacity after 3,000 cycles when charged and discharged at a rate that would fill the battery in under 15 minutes. (Again, capacity decayed more rapidly at lower charging rates.)

The material's conductivity wasn't great, but the researchers found they could improve it by mixing in some conductive carbon (about 2 percent by weight). In addition, they showed that it could be layered on top of a high-capacity cathode material, acting as a solid-state electrolyte that both allows ions to flow through and stores them if the capacity of the cathode material is saturated.

A quick fix

The secret of the material's durability appears to be the fact that it undergoes phase transitions during the charging cycle. As more of the lithium leaves the structure, the position of the iron relative to the chlorine can shift, creating three different phases during the full cycle. Overall, the material expands by about 8 percent as it fills up with ions during charging.

The melting point also changes; combined with the heat associated with charge/discharge, this may contribute to a key change in the material's properties: The material undergoes a transition from brittle to ductile, meaning it's easier to deform. This ductility made the material self-healing. "Cracks and voids present in the pristine Li_1.3Fe_1.2Cl₄ electrode are completely healed upon charging," the researchers wrote. That self-healing is almost certainly the primary factor behind the ability of this cathode material to hold onto 90 percent of its capacity after the equivalent of 10 years of daily charging.

Beyond the self-healing, there's a lot to like about this material. It's fast charging, has reasonable capacity, and uses cheap and abundant raw materials. The biggest drawback is probably the manufacturing process described in the paper, as it's hard to scale the pulverization process that was used in the lab. The researchers have an idea about how to do better, but it's still not clear how readily this material can be incorporated into battery manufacturing.

The material may or may not work out in manufacturing, but this work shows that even after years of dominating battery technology, lithium ions still have some largely unexplored chemistries with surprises waiting for us.

Nature, 2025. DOI: 10.1038/s41586-025-09153-1  (About DOIs).

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Tesla’s robotaxi rollout has been rockier than the fanboys and influencers who got early access to the company’s driverless vehicles would like you to believe. And thanks to these diligent Redditors, we now have a list of all the mistakes the company’s “unsupervised” vehicles have made in the first couple days.

Some are relatively minor, like failing to recognize a reversing UPS truck while trying to pull into a parking space or driving over a curb. Others are more worrisome, like briefly driving on the wrong side of the road or dropping passengers off in the middle of a busy intersection.

Several incidents involve “phantom braking,” in which the vehicle stops suddenly for seemingly no reason. Tesla’s camera-only perception system has long had problems with phantom braking, appearing to misinterpret shadows, road marking, or other environmental factors, which triggers the vehicle’s automatic emergency braking. The Reddit list includes three incidents of phantom braking.

Here’s the other incidents that have cropped up so far:

Tesla has said it’s gathering feedback from riders on how to improve the robotaxi service. Some early riders posted their thoughts on X, but mostly around improving the app experience. (The app doesn’t allow you to adjust your pickup location, nor does it let you drop a pin in the service area for a more precise drop-off.) Sawyer Merritt, an X user who posts pro-Tesla content, said he didn’t experience any problems in his 20 rides over two days. “No interventions, no critical safety issues. All my rides were smooth and comfortable,” he wrote.

But the above list suggests that not everyone’s experience was so seamless. Also, the only way we know about any of these incidents is because robotaxi customers are documenting their rides and posting them on social media. Texas doesn’t require any incident reporting or data sharing from Tesla — though the state did recently approve a new permitting system that could prove to be more difficult for the company to navigate. One provision allows state regulators to revoke permits if a company’s autonomous vehicles are deemed a safety risk.

Keep in mind, these are the incidents that cropped up among a small fleet of 10-20 vehicles in just three days of semi-public availability. Musk has said he wants thousands of vehicles on the road within months, and perhaps “a million” by the end of next year. Imagine what the list looks like at that point.

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In recent years, a curious hypothetical particle called the axion, invented to address challenging problems with the strong nuclear force, has emerged as a leading candidate to explain dark matter. Although the potential for axions to explain dark matter has been around for decades, cosmologists have only recently begun to seriously search for them. Not only might they be able to resolve some issues with older hypotheses about dark matter, but they also offer a dizzying array of promising avenues for finding them.

But before digging into what the axion could be and why it’s so useful, we have to explore why the vast majority of physicists, astronomers, and cosmologists accept the evidence that dark matter exists and that it’s some new kind of particle. While it’s easy to dismiss the dark matter hypothesis as some sort of modern-day epicycle, the reality is much more complex (to be fair to epicycles, it was an excellent idea that fit the data extremely well for many centuries).

The short version is that nothing in the Universe adds up.

We have many methods available to measure the mass of large objects like galaxies and clusters. We also have various methods to assess the effects of matter in the Universe, like the details of the cosmic microwave background or the evolution of the cosmic web. There are two broad categories: methods that rely solely on estimating the amount of light-emitting matter and methods that estimate the total amount of matter, whether it’s visible or not.

For example, if you take a picture of a generic galaxy, you’ll see that most of the light-emitting matter is concentrated in the core. But when you measure the rotation rate of the galaxy and use that to estimate the total amount of matter, you get a much larger number, plus some hints that it doesn’t perfectly overlap with the light-emitting stuff. The same thing happens for clusters of galaxies—the dynamics of galaxies within a cluster suggest the presence of much more matter than what we can see, and the two types of matter don’t always align. When we use gravitational lensing to measure a cluster’s contents, we again see evidence for much more matter than is plainly visible.

The tiny variations in the cosmic microwave background tell us about the influence of both matter that interacts with light and matter that doesn’t. It clearly shows that some invisible component dominated the early Universe. When we look at the large-scale structure, invisible matter rules the day. Matter that doesn’t interact with light can form structures much more quickly than matter that gets tangled up by interacting with itself. Without invisible matter, galaxies like the Milky Way can’t form quickly enough to match observations of the early Universe.

The calculations of Big Bang nucleosynthesis, which correctly predict the abundances of hydrogen and helium in the Universe, put strict constraints on how much light-emitting matter there can be, and that number simply isn’t large enough to accommodate all these disparate results.

Across cosmic scales in time and space, the evidence just piles up: There’s more stuff out there than meets the eye, and it can’t simply be dim-but-otherwise-regular matter.

Weakness of WIMPs

Since pioneering astronomer Vera Rubin first revealed dark matter in a big way in the 1970s, the astronomical community has tried every idea it could think of to explain these observations. One tantalizing possibility is that the dark matter is the entirely wrong approach; instead, we’re misunderstanding gravity itself. But so far, half a century later, all attempts to modify gravity ultimately fail one observational test or another. In fact, the most popular modified gravity theory, known as MOND, still requires the existence of dark matter, just less of it.

As the evidence piled up for dark matter in the 1980s and '90s, astronomers began to favor a particular explanation known as WIMPs, for weakly interacting massive particles. WIMPs weren’t just made up on the spot. They were motivated by particle physics and our attempts to create theories beyond the Standard Model. Many extensions to the Standard Model predicted the existence of WIMP-like particles that could be made in abundance in the early Universe, generating a population of heavy-ish particles that remained largely in the cosmic background.

WIMPs seemed like a good idea, as they could both explain the dark matter problem and bring us to a new understanding of fundamental physics. The idea is that we are swimming in an invisible sea of dark matter particles that almost always simply pass through us undetected. But every once in a while, a WIMP should interact via the weak nuclear force (hence the origin of its name) and give off a shower of byproducts. One problem: We needed to detect one of these rare interactions. So experiments sprang up around the world to catch an elusive dark matter candidate.

With amazing names like CRESST, SNOLAB, and XENON, these experiments have spent years searching for a WIMP to no avail. They’re not an outright failure, though; instead, with every passing year, we know more and more about what the WIMP can’t be—what mass ranges and interaction strengths are now excluded.

By now, that list of what the WIMP can’t be is rather long, and large regions within the space of possibilities are now hard-and-fast ruled out.

OK, that’s fine. I mean, it’s a huge bummer that our first best guess didn’t pan out, but nature is under no obligation to make this easy for us. Maybe the dark matter isn’t a WIMP at all.

More entities are sitting around the particle physics attic that we might be able to use to explain this deep cosmic mystery. And one of those hypothetical particles is called the axion.

Cleaning up with axions

It was the late 1970s, and physicist Frank Wilczek was shopping for laundry detergent. He found one brand standing out among the bottles: Axion. He thought that would make an excellent name for a particle.

He was right.

For decades, physicists had been troubled by a little detail of the theory used to explain the strong nuclear force, known as quantum chromodynamics. By all measurements, that force obeys charge-parity symmetry, which means if you take an interaction, flip all the charges around, and run it in a mirror, you’ll get the same result. But quantum chromodynamics doesn’t enforce that symmetry on its own.

It seemed to be a rather fine-tuned state of affairs, with the strong force unnaturally maintaining a symmetry when there was nothing in the theory to explain why.

In 1977, Roberto Peccei and Helen Quinn discovered an elegant solution. By introducing a new field into the Universe, it could naturally introduce charge-parity symmetry into the equations of quantum chromodynamics. The next year, Wilczek and Gerard 't Hooft independently realized that this new field would imply the existence of a particle.

The axion.

Dark matter was just coming on the cosmic scene. Axions weren’t invented to solve that problem, but physicists very quickly realized that the complex physics of the early Universe could absolutely flood the cosmos with axions. What’s more, they would largely ignore regular matter and sit quietly in the background. In other words, the axion was an excellent dark matter candidate.

But axions were pushed aside as the WIMPs hypothesis gained more steam. Back-of-the-envelope calculations showed that the natural mass range of the WIMP would precisely match the abundances needed to explain the amount of dark matter in the Universe, with no other fine-tuning or adjustments required.

Never ones to let the cosmologists get in the way of a good time, the particle physics community kept up interest in the axion, finding different variations on the particle and devising clever experiments to see if the axion existed. One experiment requires nothing more than a gigantic magnet since, in an extremely strong magnetic field, axions can spontaneously convert into photons.

To date, no hard evidence for the axion has shown up. But WIMPs have proven to be elusive, so cosmologists are showing more love to the axion and identifying surprising ways that it might be found.

A sloshy Universe

Axions are tiny, even for subatomic particles. The lightest known particle is the neutrino, which weighs no more than 0.086 electron-volts (or eV). Compare that to, say, the electron, which weighs over half a million eV. The exact mass of the axion isn’t known, and there are many models and versions of the particle, but it can have a mass all the way down to a trillionth of an eV… and even lower.

In fact, axions belong to a much broader class of “ultra-light” dark matter particle candidates, which can have masses down to 10^-24 eV. This is multiple billions of times lighter than the WIMPs—and indeed most of the particles of the Standard Model.

That means axions and their friends act nothing like most of the particles of the Standard Model.

First off, it may not even be appropriate to refer to them as particles. They have such little mass that their de Broglie wavelength—the size of the quantum wave associated with every particle—can stretch into macroscopic proportions. In some cases, this wavelength can be a few meters across. In others, it’s comparable to a star or a solar system. In still others, a single axion “particle” can stretch across an entire galaxy.

In this view, the individual axion particles would be subsumed into a larger quantum wave, like an ocean of dark matter so large and vast that it doesn’t make sense to talk about its individual components.

And because axions are bosons, they can synchronize their quantum wave nature, becoming a distinct state of matter: a Bose-Einstein condensate. In a Bose-Einstein condensate, most of the particles share the same low-energy state. When this happens, the de Broglie wavelength is larger than the average separation between the particles, and the waves of the individual particles all add up together, creating, in essence, a super-particle.

This way, we may get axion “stars”—clumps of axions acting as a single particle. Some of these axion stars may be a few thousand kilometers across, wandering across interstellar space. Still others may be the size of galactic cores, which might explain an issue with the traditional WIMP picture.

The best description of dark matter in general is that it is “cold,” meaning that the individual particles do not move fast compared to the speed of light. This allows them to gravitationally interact and form the seeds of structures like galaxies and clusters. But this process is a bit too efficient. According to simulations, cold dark matter tends to form more small, sub-galactic clumps than we observe, and it tends to make the cores of galaxies much, much denser than we see.

Axions, and ultra-light dark matter in general, can provide a solution here because they would operate in two modes. At large scales, they can act like regular cold dark matter. But inside galaxies, they can condense, forming tight clumps. Critically, these clumps have uniform densities within them. This smooths out the distribution of axions within galaxies, preventing the formation of smaller clumps and ultra-dense cores.

A messy affair

Over the decades, astronomers and physicists have found an astounding variety of ways that axions might reveal their presence in the Universe. Because of their curious ability to transmute into photons in the presence of strong magnetic fields, any place that features strong fields—think neutron stars or even the solar corona—could produce extra radiation due to axions. That makes them excellent hunting grounds for the particles.

Axion stars—also sometimes known provocatively as dark stars—would be all but invisible under most circumstances. That is, until they destabilize in a cascading chain reaction of axion-to-photon conversion and blow themselves up.

Even the light from distant galaxies could betray the existence of axions. If they exist in a dense swarm surrounding a galaxy, their conversion to photons will contribute to the galaxy’s light, creating a signal that the James Webb Space Telescope can pick up.

To date, despite all these ideas, there hasn’t been a single shred of solid evidence for the existence of axions, which naturally drops them down a peg or two on the credibility scale. But that doesn’t mean that axions aren’t worth investigating further. The experiments conducted so far only place limits on what properties they might have; there’s still plenty of room for viable axion and axion-like candidates, unlike their WIMPy cousins.

There’s definitely something funny going on with the Universe. The dark matter hypothesis—that there is a large, invisible component to matter in the Universe—isn’t that great of an idea, but it’s the best one we have that fits the widest amount of available evidence. For a while, we thought we knew what the identity of that matter might be, and we spent decades (and small fortunes) in that search.

But while WIMPs were the mainstay hypothesis, that didn’t snuff out alternative paths. Dozens of researchers have investigated modified forms of gravity to equal levels of unsuccessfulness. And a small cadre has kept the axion flame alive. It’s a good thing, too, since their obscure explorations of the corners of particle physics laid the groundwork to flesh out axions into a viable competitor to WIMPs.

No, we haven’t found any axions. And we still don’t know what the dark matter is. But it’s only by pushing forward—advancing new ideas, testing them against the reality of observations, and when they fail, trying again—will we come to a new understanding. Axions may or may not be dark matter; the best we can say is that they are promising. But who wouldn’t want to live in a Universe filled with dark stars, invisible Bose-Einstein condensates, and strange new particles?

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Now that Tesla has replied, it has requested that the NHTSA withhold the entire response from the public, classifying it as confidential business information. This isn't too surprising, as the company is notoriously secretive about its performance data, especially in areas like Autopilot and Full Self-Driving. Here are a few paraphrased versions of the questions Tesla faced:

• How will the system handle bad weather or poor visibility?
• What happens if the system detects that it cannot drive safely? Does it pull over?
• Will a human be monitoring the cars remotely or in person?
• Does the system follow any existing industry standards for autonomous driving?
• When does Tesla plan to let other people operate their own cars as robotaxis?

The feds have good reason to ask. On its first day, Tesla's Robotaxi service was caught on video making some questionable moves, including driving in the wrong lane against traffic, as seen below (full video here). The clip was also shared in our community forums, though you'll need a free membership to access the off-topic section.

Here's another showing a Robotaxi dropping passengers in the middle of an intersection. For now, the service runs with a human safety driver (likely a Tesla employee) in the passenger seat. Billionaire Dan O'Dowd, a persistent critic of Tesla's software, felt the company's launch was lackluster, and the videos circulating online demonstrate that the technology is years behind competitors like Waymo, which has operated without in-car supervisors since 2019.

For its part, NHTSA acknowledged being aware of the widely reported incidents and is in contact with Tesla to get more information. The agency's statement reminded the public that manufacturers self-certify their vehicles' safety, and NHTSA's role is to investigate and act on safety problems after they are on the road:

NHTSA is aware of the referenced incidents and is in contact with the manufacturer to gather additional information. NHTSA will continue to enforce the law on all manufacturers of motor vehicles and equipment, in accordance with the Vehicle Safety Act and our data-driven, risk-based investigative process.

 

Under U.S. law, NHTSA does not pre-approve new technologies or vehicle systems – rather, manufacturers certify that each vehicle meets NHTSA’s rigorous safety standards, and the agency investigates incidents involving potential safety defects. Following an assessment of those reports and other relevant information, NHTSA will take any necessary actions to protect road safety.

This situation gets even more interesting when you look at the bigger picture.

This has led some to worry about regulatory capture. As one cynical comment on Electrek's article notes, the official who signed the letter to Tesla, Tanya Topka, Director of NHTSA's Office of Defects Investigation, may have put a target on her back just for trying to hold the company accountable.

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A European company that seeks to develop orbital spacecraft for cargo, and eventually humans, took a step forward this week with a test flight that saw its "Mission Possible" vehicle power up and fly successfully in orbit before making a controlled reentry into Earth's atmosphere.

However, after encountering an "issue," the Exploration Company lost contact with its spacecraft a few minutes before touchdown in the ocean.

In an update on LinkedIn Tuesday morning, the company characterized the test flight as a partial success—and a partial failure.

"The capsule was launched successfully, powered the payloads nominally in-orbit, stabilized itself after separation with the launcher, re-entered and re-established communication after black out," the company said in a statement. "We are still investigating the root causes and will share more information soon. We apologize to all our clients who entrusted us with their payloads."

Maybe it was the parachutes

Reestablishing communications with the spacecraft after the blackout period suggests that the vehicle got through the most thermally challenging part of reentry into Earth's atmosphere and perhaps validated the spacecraft's handling and ability to withstand maximum heating.

Following this, according to the company's timeline for Mission Possible, the capsule's parachutes were due to deploy at a velocity between Mach 0.8 and Mach 0.6. The parachutes were selected for their "proven flight heritage," the company said, and were procured from US-based Airborne Systems, which provides parachutes used by SpaceX’s Dragon, Boeing's Starliner, and other spacecraft.

Given when the spacecraft was lost, it seems most likely that there was a problem with the deployment of the drogue or main parachutes.

Mission Possible was a 2.5-meter diameter demonstration vehicle that was among the larger payloads launched Monday afternoon on SpaceX's Transporter 14 mission from Vandenberg Space Force Base in California. The mission sought to test four primary areas of spaceflight: structural performance in orbital flight, surviving reentry, autonomous navigation, and recovery in real-world conditions. It only clearly failed in this final task, recovering the vehicle within three days to return on-board payloads to customers.

Meeting an aggressive timeline

It is refreshing to have such clear and concise communication from a space company, especially the acknowledgment that a flight was a partial failure, within hours of launch. And it is not a surprise that there were technical challenges on a vehicle that was put together fairly rapidly and at a low cost.

In an interview with Ars last November, the founder of The Exploration Company, Hélène Huby, said Mission Possible was developed at a cost of about $20 million in 2.5 years, in addition to $10 million for the rideshare launch on the Falcon 9 rocket.

At the time, she said Mission Possible was on track to launch this summer, and the company met this timeline.

Given the potential issues with the parachute system or other problems near touchdown, it is possible that The Exploration Company may fly another subscale demonstration mission before moving into development of its full-size Nyx cargo spacecraft.

"This partial success reflects both ambition and the inherent risks of innovation," the company said Tuesday morning. "Leveraging the technical milestones achieved yesterday and the lessons we will extract from our ongoing investigation, we will then prepare to re-fly as soon as possible."

Working toward Nyx

To date, the company has raised more than $230 million and plans to use much of that for the development of Nyx, which could fly as early as 2028 and focus on cargo delivery missions to low-Earth orbit. By demonstrating this capability, Huby said her company would like to secure funding from the European Space Agency to develop a crew-rated version of the spacecraft and a vehicle to return cargo from the Moon.

This is not an unreasonable plan. SpaceX required significant funding from NASA, nearly $3 billion, to develop its Crew Dragon vehicle after demonstrating an initial cargo version. Huby said The Exploration Company would require a similar amount of funding from European nations. It is not possible to raise that money from private capital markets right now by promising a great return a decade from now.

By one metric, Monday's flight was a significant success. Compared to the United States and China, the commercial space industry in Europe has lagged behind, beset by a less favorable environment for startups and opposition by large, traditional space companies that have dominated Europe's orbital activities for decades. The Exploration Company reached space with a fairly large vehicle and flew it back through Earth's atmosphere less than four years after its founding. This is a credible start for the company.

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