To most of us, time feels as solid as the phone alarm that drags us out of bed or the calendar that fills up faster than we would like. Yet a growing group of physicists and philosophers now argue ...

Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that describe gravity, quantum fields and the structure of spacetime now allow ...

Physicists long believed time was a basic feature of the universe. But it may just emerge from cosmic information.

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...