Scientists detect record-breaking neutrino from beyond the Milky Way

Scientists have detected the highest-energy neutrino ever observed, arriving at Earth with 30 times the energy of the previous record. This neutrino likely comes from outside the Milky Way, with 12 potential sources identified, all blazars powered by supermassive black holes. The neutrino was detected by the KM3NeT telescope in the Mediterranean Sea on February 13, 2023. It produced a muon that illuminated a third of the detector's sensors, indicating its extraordinary energy of 220 million billion electron volts. Researchers are investigating whether the neutrino originated from a cosmic particle accelerator or a collision between a cosmic ray and photons from the early universe. This detection could lead to new insights in multi-messenger astronomy.