Size: 5 x 6.45 inches; Time zones: 7; This large atomic alarm clock can either be set on a tabletop or hung on your wall with the included mount. This battery-powered alarm clock requires three ...

Atomic clock slices time into half-milliseconds / Games' cesium device sets stopwatch ...

Setting the time on a clock is easy – unless it’s one of the most accurate in the world. Now a light signal sent between two German cities has set a new record for the transmission of an ...

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 ...

A newly-designed atomic clock uses entangled atoms to keep time even more precisely than its state-of-the-art counterparts. The design could help scientists detect dark matter and study gravity's ...

Atomic clocks are our most precise timekeepers, with the best ones keeping time to within one second in 15 billion years. But there’s always room for improvement, as researchers at MIT have now ...

When the first person set the very first clock, how did they know what time to set it to? We go on a quest into the history of timekeeping, from sundials to atomic clocks. Show more When the first ...