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Although still under construction, the sea-floor KM3NeT detector spotted a neutrino 20 times more powerful than any previously detected.
Astrophysicists have observed the most energetic neutrino ever. The particle — which probably came from a distant galaxy — was spotted by the Cubic Kilometre Neutrino Telescope (KM3NeT), a collection of light-detecting glass spheres on the floor of the Mediterranean Sea, on 13 February 2023. Researchers monitoring the telescope did not notice the detection until early 2024, when they completed the first analysis of their data. They unveiled it as a potentially record event last year at a conference in Milan, Italy, but did not disclose details such as the timing, direction or energy of the neutrino.
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doi: https://doi.org/10.1038/d41586-025-00444-1
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