Cosmic ghost neutrinos whisper from ancient supernovae

Researchers analyzing 14 years of data from the Super-Kamiokande detector report a likely signal of the Diffuse Supernova Neutrino Background—the universe’s background of neutrinos from all past core-collapse supernovas—marking a potential first detection of these cosmic 'ghost' particles; if confirmed, it would illuminate how dying stars enrich their environments and form compact remnants, with plans to combine data with Hyper-Kamiokande to boost sensitivity.