Satellite navigation systems for lunar settlements will require local atomic clocks. Researchers are figuring out what time they will keep.

What time is it on the moon? One wristwatch tried to answer that question, yet was largely forgotten by history.

An atomic clock is a highly accurate time-keeping device that uses the vibrations of atoms to measure time. It is used in many applications that require precise timing, such as GPS systems and ...

The tick of the world clock depends on hundreds of atomic oscillators positioned across the globe.

The clock's new time of 89 seconds to midnight was announced on 28 January, moving one second closer than where it had remained for the previous two years. But what does it actually mean?

Atomic scientists reset the Doomsday Clock on Tuesday, moving its hands to 90 seconds to midnight - closer than ever before to the threat of annihilation.