There are plenty of atomic watches available that can keep time accurately by receiving a radio signal from an atomic clock, but there hasn't ever been a true atomic wristwatch which boasts its own ...

If the current crop of smartwatches isn't to your liking, perhaps this truly smart watch on Kickstarter will fit the bill. It's called the Cesium 133 and is the world's first wristwatch powered by a ...

A second is only a second because we’ve defined it as such. And that definition has changed over, well, time. In fact, it may change again later this decade. In 1967, after decades of study, we tossed ...

2005 marks the 50th anniversary of the cesium atomic clock. In 1955, Dr. Louis Essen and Jack Perry developed the first accurate cesium atomic clock at the National ...

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 ...