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 aren’t known for playing fast and loose with the rules of reality. But when it comes to the concept of space, some take a remarkably permissive attitude. For most of us, it would seem there ...

Time has always seemed like the one thing physics could count on. Matter changes, stars die, particles flicker in and out, but time keeps moving. That assumption sits so deep in modern science that it ...

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 ...

U.S. physicist Garrett Lisi is working on an explanation of the Theory of Everything, a theory that would explain everything in the universe. An explanation of the Theory of Everything (ToE) has been ...