Time is almost up on the way we track each second of the day, with optical atomic clocks set to redefine the way the world ...

This has now paved the way for a multi-ion optical ytterbium clock that combines the high accuracy of single-ion clocks with ...

For many years, cesium atomic clocks have been reliably keeping time around the world. But the future belongs to even more accurate clocks: optical atomic clocks. In a few years' time, they could ...

Smaller version Illustration of a conventional atomic fountain clock (left) next to NPL’s miniature atomic fountain clock.

Nuclear weapons, climate change and biological threats are the biggest concerns.

The new Doomsday Clock time has been set by the Bulletin of the Atomic Scientists. Here’s what it means.

Researchers at the UK’s National Physical Laboratory (NPL) have created a tiny atomic fountain ...

The most precise clocks ever built are now testing Einstein, hunting dark matter, and reshaping how we define time itself. In ...