Physicists fail to find mysterious 'sterile neutrino' particles

Researchers have, once again, failed to find any signs that hypothesised particles called sterile neutrinos exist. Neutrinos are some of the most abundant elementary particles in the Universe. There are three known types, but scientists have been searching for a fourth kind of neutrino for decades. If found, it could help to solve pressing problems in particle physics. Now, an experiment called MicroBooNE at the Fermi National Accelerator Laboratory did not turn up evidence of sterile neutrinos.