Physicists in the US have observed an effect known as time reflection in an electromagnetic wave for the first time. They detected the phenomenon – the temporal counterpart of familiar spatial ...

Scientists have hypothesized for over six decades the possibility of observing a form of wave reflections known as temporal, or time, reflections. Researchers detail a breakthrough experiment in which ...

Can we turn back time? Ask a savvy physicist, and the answer will be “it depends.” Schemes for retrograde time travel abound but usually involve irreconcilable paradoxes and rely on outlandish ...