Nuclear clocks are the next big thing in ultra-precise timekeeping. Recent publications in the journal Nature propose a new method and new technology to build the clocks. Timekeeping has become more ...

New research suggests time may have a tiny inherent uncertainty, offering insights into quantum mechanics and gravity.

What a makes a good clock? Andrew Ludlow, a physicist at the National Institute of Standards and Technology, says one of the most important criteria is stability. "If you could imagine a grandfather ...

A new generation of optical atomic clocks, some accurate enough to lose less than a second over the entire age of the universe, is driving an international push to replace the cesium-based definition ...

Scientists built a tiny clock from single-electron jumps to probe the true energy cost of quantum timekeeping. They discovered that reading the clock’s output requires vastly more energy than the ...

Researchers are looking for new ways to improve timekeeping because even small gains in stability can help physicists discover subtle physical effects. The thorium-229 nuclear clock is a newer venture ...

A portable atomic clock that has been successfully tested at sea could change the future of marine navigation.