Hundreds of gamma ray signals were detected with ultra-high energies, with the most powerful signals crossing the Peta-electronvolt (PeV) threshold – much higher than thought possible in our galaxy.

The study, entitled "A tera-electronvolt afterglow from a narrow jet in an extremely bright GRB 221009A," was completed by the LHAASO international collaboration. About two billion years ago ...

The latest data, recently published in Science, establish an upper limit of 8 x 10-37 kg (or in scientific language 0.45 electronvolt/c 2) for the neutrino mass. With this result, KATRIN ...