Since the dawn of modern warfare, the best way to stay alive in the face of incoming fire has been to take cover behind a wall. But thanks to a game-changing “revolutionary” rifle, the U.S. Army has made that tactic dead on arrival. Now…

A fourth neutrino could help explain dark matter Physicists working with a Fermilab neutrino experiment may have found a new elementary particle whose behavior breaks the known laws of physics. If correct, their results poke holes in the accepted Standard Model of particles and…