The origins of the Universe may finally be solved way sooner than you think

Physicists predict detectable primordial black hole explosions within a decade, potentially confirming Hawking radiation and dark matter.

Physicists at the University of Massachusetts Amherst have published new research in Physical Review Letters suggesting that we may witness a black hole explosion within the next ten years. For decades, scientists believed such events were extraordinarily rare, perhaps occurring only once every 100,000 years. The new study challenges that assumption and argues that the odds may be far higher, with existing gamma-ray telescopes already capable of detecting the event if it occurs.

The black holes involved in this prediction are known as primordial black holes (PBHs). Unlike ordinary black holes, which form when massive stars collapse at the end of their lives, primordial black holes are hypothetical objects thought to have formed less than a second after the Big Bang, when the early universe was unimaginably hot and dense. According to Big Bang cosmology, tiny fluctuations in matter density during those first moments may have collapsed under gravity, creating black holes with masses far smaller than stellar black holes. Physicists are especially interested in PBHs because they could preserve information about the infant universe and may even account for some of the mysterious dark matter believed to make up most of the universe’s mass.

What makes primordial black holes particularly important is a theory called Hawking radiation, proposed by Stephen Hawking in 1974. Hawking radiation emerges from quantum effects near a black hole’s event horizon, where pairs of particles can briefly appear due to fluctuations in empty space. One particle may escape while the other falls into the black hole, causing the black hole to slowly lose energy and mass. This process connects two major pillars of modern physics — quantum mechanics and Einstein’s theory of gravity — and remains one of the most important theoretical ideas in cosmology.

The theory predicts a surprising effect: the smaller a black hole becomes, the hotter it gets. As a result, tiny primordial black holes would emit particles increasingly rapidly as they shrink. This process, known as black hole evaporation, accelerates over time in a runaway cycle until the black hole ultimately explodes in a burst of extremely energetic radiation, especially gamma rays. While evaporation for large stellar black holes would take far longer than the age of the universe, lightweight primordial black holes could theoretically be reaching their final explosive stages today.

Andrea Thamm, assistant professor of physics at University of Massachusetts Amherst and co-author of the study, explained: “The lighter a black hole is, the hotter it should be and the more particles it will emit. As PBHs evaporate, they become ever lighter, and so hotter, emitting even more radiation in a runaway process until explosion. It’s that Hawking radiation that our telescopes can detect.”

Detecting such an explosion would represent a historic scientific breakthrough. It would provide the first direct observational evidence for Hawking radiation, something physicists have searched for for decades. It would also offer the first confirmed proof that primordial black holes truly exist. More importantly, the radiation emitted during the final explosion could contain evidence of every fundamental particle in nature. That includes known particles such as electrons and quarks, but potentially also unknown particles associated with dark matter or entirely new sectors of physics never before observed.

The study proposes a new explanation for why such explosions may be more observable than previously believed. Traditionally, scientists assumed that exploding primordial black holes would be too rare and too short-lived for current telescopes to detect. However, the researchers introduce a speculative framework called the dark-QED model. Ordinary quantum electrodynamics (QED) is the highly successful theory describing how light and electrically charged particles interact through photons. The dark-QED model imagines a hidden version of this force involving hypothetical dark particles, including a dark photon and a heavy dark electron.

In this model, primordial black holes can carry a special kind of “dark” electric charge. That charge temporarily stabilizes the black hole and slows its evaporation, allowing it to survive much longer than expected. Eventually, however, the black hole discharges and transitions into behavior resembling a Schwarzschild black hole — the simplest theoretical black hole model, first described by physicist Karl Schwarzschild in 1916 using Einstein’s equations of general relativity. A Schwarzschild black hole possesses mass but no charge or rotation, and physicists often use it as the baseline model for understanding black hole physics.

According to the researchers, this extended lifetime dramatically increases the probability of observing a primordial black hole explosion. Instead of being a once-in-100,000-years event, they estimate there may be over a 90 percent chance of detecting one within the next decade using existing gamma-ray observatories. Gamma-ray astronomy focuses on the highest-energy form of electromagnetic radiation and is particularly useful for studying violent cosmic phenomena such as black hole evaporation, neutron stars and supernovae.

If scientists do observe such an explosion, the implications would extend far beyond black holes alone. It could reveal entirely new particles, provide insights into dark matter, and open an unprecedented window into the earliest moments of the universe immediately after the Big Bang. It would also offer one of the clearest opportunities yet to unite quantum mechanics with gravity — a goal physicists have pursued for nearly a century. With telescopes already scanning the skies, researchers are now watching for what could become one of the most important discoveries in the history of modern physics.

Source: University of Massachusetts Amherst, APS

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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Posted Monday 18 May 2026 at 7:36 am AEST (my time).

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