In 1905, Einstein's groundbreaking work showed that the speed of light in a vacuum is independent of the motion of all observers, and the laws of physics are the same for all so-called ...

Score one more for Einstein. A new study has confirmed his theory of general relativity works on extremely large scales. The study was one of the first rigorous tests of this theory of gravity beyond ...

All you need is a couple of ultra-precise clocks, a mountain and a reliable kid or three to help out, and relativity, the theory that shows how time and space are woven together, is a snap to ...