PhysicsWatch a beam of light bounce off mirrors in ultra-slow motion For the first time, researchers have taken a video of a pulse of laser light as it moves in three dimensions, using a camera with a shutter speed of a trillionth of a second. It could potentially be used to see around corners News
PhysicsWhat does gravity weigh? The surprise answer that reshapes reality We long assumed particles carrying the force of gravity couldn't have mass. That's wrong – and it may mean gravity travels at different speeds across the cosmos. Features