To find out how clock accuracy is verified and which reference is used for comparison, we visited the Belarusian State Institute of Metrology (BelGIM), where most of the national standards are kept.

Ultra precise Chinese lattice clock joins international system, challenging decades of US dominance in global timekeeping ...

Breakthrough could pave the way for next-generation GPS in drones, smartphones and self-driving cars, scientists say.

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 ...

Keeping perfect time is far trickier than it sounds. The world’s best clocks that ...