The National Institute of Standards and Technology's new cesium fountain clock is one of the most precise atomic clocks ever created.

After 78 years, the Doomsday Clock has been set closer than it has ever been. As a global society, we are now only 89 seconds to midnight after scientists moved the clock’s hand one second ...

NIST scientists have published results establishing a new atomic clock, NIST-F4, as one of the world’s most accurate timekeepers, priming the clock to be recognized as a primary frequency ...

First we got the bomb and that was good/ ‘Cause we love peace and motherhood/ Then Russia got the bomb, but that’s OK/ ‘Cause ...

As the world marks the 80th anniversary of the first use of a nuclear weapon, on the Japanese city of Hiroshima near the end ...

Anyone trotting out the well-worn "it’s been a long day" line on July 22 might end up having to rephrase, as Earth is set for its second shortest day on record due to an inexplicable recent ...

PBS doc 'Atomic People' features survivors who talk about what it was like in, Japan, when the atomic bombs dropped.

On Tuesday, Earth is projected for one of its shortest days since record-keeping began more than 50 years ago.

Atomic clocks use quantum physics and the resonant frequency of atoms, like cesium, to define time. Modern timekeeping relies on the accuracy of atomic clocks, which revolutionized timekeeping by ...