Testing Einstein's Relativity With a Cosmic Neutrino

The arrival of a tiny cosmic particle from a distant, extremely energetic place in the universe enabled researchers to test key principles of general relativity and special relativity. Their results will be especially valuable for scientists attempting to merge quantum physics and general relativity through "quantum gravity" models.The particle was a neutrino, an elementary particle with a miniscule mass that rarely interacts with anything and travels at practically the speed of light. Neutrinos...