Tucked away at the National Physical Laboratory in Teddington, south-west London, there is a clock which takes up most of a room – and which is so accurate it could actually redefine the second. At ...

A top secret lab is developing a super-precise 'quantum clock' that could revolutionize British intelligence. This super-accurate timekeeping device, to be rolled out by 2029, will allow more precise ...

Atomic clocks. They almost sound like something out of science fiction, or an experiment confined to some elite physics lab, but in reality, they’ve been around since the 1950s in one form or another.

Two independent groups of physicists in Germany and China have built portable optical clocks that are more accurate than the best caesium devices. They say that their instruments could be used to ...

Small timekeeping errors can lead to substantial problems for many applications that depend on precise timing. For example, radio navigation systems, such as GPS, work by comparing the time it takes ...

With a new, “portable” atomic clock, scientists are measuring not what time it is but changes to time itself. What do I mean? Researchers from a group of European labs have tested a next-generation ...

Scientists have used a portable “atomic clock” to measure gravity for the first time. The device makes use of small changes in the flow of time at different altitudes to measure the Earth’s gravity.