The world's most precise clock can keep time for 5 billion years

If you want to know exactly what time it is, head of over to Boulder, Colorado, where a fountain of cesium atoms ticks off the U.S.'s official time. It should be accurate for the next 300 million years. But don't be impressed—the world's actual most precise clock is a few miles away at a different lab in Boulder,… » 11/03/14 6:34pm 11/03/14 6:34pm

Inside the Beating Heart of an Optical Atomic Clock

Behold, the beating heart of a time machine! Or "clock", as most people call them, but this one is nothing like your grandfather's. This super-accurate timekeeper is an optical atomic clock built by the UK's National Physical Laboratory (NPL) and its tick is governed by a single ion of the element strontium. » 2/05/13 9:20am 2/05/13 9:20am

An Amazing Vintage Video About the World's First Accurate Atomic Clock

This short video, made at the UK's National Physical Laboratory, proudly explains the science behind the world's first accurate atomic clock. It was designed by Louis Essen and built at the National Physical Laboratory in 1955, and the video is worth watching for the voice-over alone. » 5/08/12 4:43am 5/08/12 4:43am

This Quantum Clock Is 100,000 Times More Accurate Than the Atomic Clock

As Make puts it, the atomic clock is old and busted. The quantum-logic clock from National Institute of Standards and Technology, keeping time 100,000 times more accurately than its predecessor, is definitely the new hotness. » 2/06/10 1:15pm 2/06/10 1:15pm

New Atomic Clock Will Be Accurate for 200 Million Years

Physicists at the Joint Institute for Laboratory Astrophysics have developed a new atomic clock that is so accurate, it will not lose a second of time in more than 200 million years. That makes the old atomic clock record holder and its 80 million year accuracy rating look like something you would get out of a gumball… » 2/15/08 6:50pm 2/15/08 6:50pm