Last week, we touched upon E=mc2, and how Einstein’s theory of relativity turned the world of physics upside-down. Now, we’re using that theory to show why the very concept of time may not be what you ...

The world’s best clocks may be sensitive to an odd mix of quantum and relativistic effects that would stretch time and test ...

Space and time seem like two completely different ideas, but Einstein showed they are interlinked in what is known as ...

Here's an unusual fact that takes a bit of explaining. The center of the Earth is around two and a half years younger than the surface. The rest of this article is behind a paywall. Please sign in or ...

Star Trek episodes set on time-dilation planets explore accelerated evolution or lifetimes for characters. Star Trek: Lower ...

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, ...