Physicists have finally turned a long standing thought experiment into a laboratory reality, showing that electromagnetic waves can be reflected in time as cleanly as light bounces off a mirror in ...

Time mirrors sounds like a concept straight out of a sci-fi film. But physicists confirm that time mirrors exist—and it’s not as mind-boggling as it sounds. Instead of a regular mirror that bounces ...

In everyday life, reflections feel simple. Light bounces off a bathroom mirror so you see your face, and sound bounces off walls so you hear an echo in a gym. Physicists call that kind of bounce a ...