F4, the latest cesium fountain clock that now stands as one of the most accurate timekeepers in the entire world.

Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards ...

The European Space Agency has launched two atomic clocks on a SpaceX rocket to the ISS to test Einstein's theory of ...

The clock hands are set by the Bulletin of the Atomic Scientists, a group formed by Manhattan Project scientists at the University of Chicago who helped build the atomic bomb but protested using it ...

NIST scientists have published results establishing a new atomic ... The NIST-F4 clock was carefully and painstakingly assembled and tested over the last few years. By joining a small group ...