Now, such high accuracy has also been demonstrated in a new type of clock, which has the potential to measure time and frequency 1,000 times more accurately than the cesium clocks that currently ...

Candle clocks were once an easy way to build a clock without using complex mechanical devices: just observe how quickly a ...

Switching to optical clocks would have cascading ripple effects from meteorology to basic physics.

As the timebase for a clock, almost anything with a periodic oscillation can be used. Traditionally, that meant a pendulum, ...

Your brain might be older than your chronological age. Here's how scientists are using the 'cognitive clock' to measure brain health.

However, progress on the nuclear clock stalled at the very first stage, when scientists tried to measure the resonance frequency of thorium-229 with the utmost precision.

The set-up isn’t technically a clock, because it hasn’t been used to measure time. But such impressive results make the development of a nuclear clock seem possible, says Safronova.

An ultra-precise measurement of a transition in the hearts of thorium atoms gives physicists a tool to probe the forces that bind the universe.