China has quietly solved a problem that only becomes obvious once you try to live and work off-world: clocks on the moon do ...

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 ...

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

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