NEWS 12 February 2025 Although still under construction, the sea-floor KM3NeT detector spotted a neutrino 20 times more powerful than any previously detected. Davide Castelvecchi Engineers prepare to add a KM3NeT module to the network of sea-floor detectors. Credit: Paschal Coyle/CNRSAstrophysicists 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-detect...