Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...

Contemporary physics has learned to describe the universe with unprecedented precision. Yet when it tries to say what time is, it stumbles again and ...

Tracking time is one of those things that seems easy, until you really start to get into the details of what time actually is. We define a second as 9,192,631,770 oscillations of a cesium atom.

Jarred Roberts receives funding from NASA. My telescope, set up for astrophotography in my light-polluted San Diego backyard, was pointed at a galaxy unfathomably far from Earth. My wife, Cristina, ...

Neil deGrasse Tyson provocatively argues that falling into a black hole would be the most extraordinary way to die, not for ...