An underwater observatory in the Mediterranean recently detected a cosmic neutrino carrying 220 petavolts of energy, more than 100,000 times stronger than particles produced in Earth's colliders. The detection by KM3NeT, described in Nature, has astrophysicists scrambling for explanations. The neutrino's origin remains unclear, but one theory suggests it came from an exploding black hole.

Stephen Hawking's 1974 prediction that black holes eventually leak and explode has never been observed. Some researchers propose that primordial black holes formed during the Big Bang could now be exploding, potentially confirming Hawking's hypothesis. If confirmed, such observations could reveal new forms of matter and energy while offering clues about the universe's origins.

Scientists at MIT and the University of Massachusetts have calculated that if primordial black holes explain dark matter, about 40 explosions should occur yearly in every cubic light-year near the Milky Way. The Mediterranean neutrino might have originated from a primordial black hole roughly 20 billion miles away. While the significance is only 2-sigma, researchers emphasize they're not claiming a discovery but demonstrating how known physics could explain the phenomenon.