Dubbed KM3-230213A, the newly-detected neutrino carried an astonishing energy of 220 peta-electronvolts (PeV), making it one of the most powerful elementary particles ever detected. Its energy was roughly a 100 million billion times the energy of visible light photons and about 30 times the highest neutrino energy previously detected. Visual impression of the ultra-high energy neutrino event observed in KM3NeT/ARCA. Image credit: KM3NeT. Cosmic neutrinos...
