Scientists in the U.S. have built the most accurate clock in the world—so precise it can measure time down to 19 decimal ...

Jacobson/NIST After two decades of tinkering, scientists at NIST have unveiled the world’s most accurate atomic clock, a ...

Einstein’s theory of relativity shows us that time isn’t constant,it stretches or contracts based on speed and gravity. But ...

The 54-pound NWA 16788 has set a new world record as the most valuable meteorite ever sold at auction. The first major ...

The mind-bending concept of time dilation results from a seemingly harmless assumption—that the speed of light is the same for all observers.

If, like me, you can't go a day without making sure your watch is synced to the second, you'll be delighted to learn that a ...

The nodes in a quantum network don’t necessarily have to be computers; they can also be atomic clocks. The cesium atoms that ...