Most of the atomic clocks in the world - fewer than 500 in total - are housed at standards institutes and used to keep time ...

A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known as NIST-F4, ...

MIT researchers double the accuracy of optical atomic clocks by reducing quantum noise with an innovative laser technique.

DENVER (KDVR) — It is said that time is relative and passes differently depending on an observer’s relative motion and gravitational potential. Although some would argue time is a construct, it does ...