Scientists Detect Mysterious High-Energy Neutrino, Sparking Theories of Exploding Black Hole

The detection of a record-breaking subatomic particle has astrophysicists speculating about the existence of primordial black holes and a possible cosmic explosion.

Mar. 29, 2026 at 10:05am

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On February 13, 2023, a new underwater observatory called the Kilometer Cube Neutrino Telescope (KM3NeT) detected a neutrino particle with an unprecedented 220 peta-electron volts of energy, far exceeding the energy of any particles produced on Earth. Astrophysicists are now theorizing that this neutrino could have originated from the explosion of a primordial black hole, a hypothesis first proposed by the late Stephen Hawking. If confirmed, this would be the first direct observation of Hawking radiation and a potential new window into the early universe.

Why it matters

The detection of this high-energy neutrino challenges our current understanding of astrophysics and could provide evidence for the existence of primordial black holes, which are theorized to make up a significant portion of the universe's mysterious dark matter. Observing an actual black hole explosion would confirm Hawking's groundbreaking work and potentially reveal new forms of matter and energy that could offer insights into the origins of the universe.

The details

The neutrino was detected by the new KM3NeT underwater observatory near Sicily, Italy. Its energy level was over 100,000 times higher than any particle produced in Earth-based colliders. Astrophysicists have proposed that the neutrino could have come from the explosion of a primordial black hole, a type of black hole that may have formed during the Big Bang and could make up a significant portion of dark matter. Calculations by physicists suggest that if primordial black holes do exist, dozens could be exploding each year near the Milky Way, releasing bursts of energy and particles like the one detected by KM3NeT.

  • The neutrino was detected on February 13, 2023.
  • Hawking first proposed the idea of black hole explosions in 1974.

The players

Stephen Hawking

The late theoretical physicist who first calculated that black holes could leak and eventually explode, releasing energy that had been entombed for centuries.

Bernard Carr

Hawking's assistant at the time who is now a professor at Queen Mary University of London, and who collaborated with Hawking on calculations about primordial black holes.

KM3NeT

An underwater observatory located in the Mediterranean Sea near Sicily that detected the record-breaking high-energy neutrino.

David Kaiser

A professor of physics and history of science at the Massachusetts Institute of Technology who leads a group studying the prospects of primordial black holes.

Michael Baker

A particle physicist at the University of Massachusetts, Amherst, who commented on the need to explain the detected neutrino.

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What they’re saying

“Our results indicate the KM3NeT event is likely the first observation of a new astrophysical source.”

— Shirley Weishi Li, Physicist, University of California, Irvine

“You'll never, ever hope to see Hawking radiation if the only black holes ever were ones that formed from dead stars. Primordial black holes have different masses and different lifetimes: Some go bang right now.”

— David Kaiser, Professor of Physics and History of Science, Massachusetts Institute of Technology

“We have a real piece of data that we need to explain. We don't currently know how to explain it.”

— Michael Baker, Particle Physicist, University of Massachusetts, Amherst

What’s next

Astronomers will be closely monitoring the region of the sky where the neutrino originated, hoping to detect any flashes of gamma rays that could confirm the explosion of a primordial black hole. The KM3NeT observatory is also expected to continue collecting data on high-energy neutrinos to better understand their origins.

The takeaway

The detection of this record-breaking neutrino has astrophysicists buzzing about the possibility of observing the long-theorized Hawking radiation from the explosion of a primordial black hole. If confirmed, this could open up a new frontier in our understanding of the early universe and the nature of dark matter.