The new clock is so reliable that it would be off by less than a second if it had started running 100 million years ago, researchers say.

The tick of the world clock depends on hundreds of atomic oscillators positioned ... agreed standard called Coordinated Universal Time, also known as UTC. UTC is defined by an agency of the ...

Whether you find yourself glancing at a clock on the wall or checking your phone, the time you constantly see is the product of a meticulous system upheld by the world’s timekeepers. In the U.S., a ...

A new atomic clock at the National Institute of Standards and Technology in Boulder is helping researchers count seconds to ...

The signal from this tuning fork—about nine gigahertz—is used to calibrate about 18 smaller atomic ... to set Coordinated Universal Time, or UTC. A thorium nuclear clock resides at the JILA ...

There are approximately 400 high-precision atomic clocks worldwide ... That is why atomic clocks form the backbone of Coordinated Universal Time (UTC) — which is used to set global time zones ...

They serve as "primary frequency standards" that work together to calibrate Coordinated Universal Time, or UTC (an agreed-upon system for keeping time using data from atomic clocks around the ...