Caesium atomic-fountain clocks are used to set national time standards at NIST, at the Paris Observatory and elsewhere. The caesium fountain clock has an accuracy of about three parts in 10 ...

An atomic clock that keeps time with the help of iodine molecules is sturdy enough to withstand a sea voyage. Credit: Will Lunden. Atomic clocks are usually either ultra-precise or sturdy, but not ...

The scientists at the National Institute of Standards and Measurement have one big job: to measure things as accurately as possible. To do that, they build a lot of big and complicated machines ...

Optical quantum clocks developed at the University of Adelaide have been proven to outperform GPS navigation systems by many ...

The IPAS team with the quantum clocks Optical quantum clocks developed at the University of Adelaide have been proven to out-perfom GPS ...

New clock just dropped, but it’ll only drop a second every 30 billion years while in operation. That’s right: It’s the most precise, accurate clock yet built.

So precise is its rhythm that, had it been running when dinosaurs walked the Earth, it would only now be off by less than a second. NIST-F4 doesn’t just keep time. It defines it.

Researchers have built an atomic clock that is more precise and accurate than any previous clock. For the first time, the clock can detect the effects of gravity predicted by the theory of general ...

Many modern atomic clocks use oscillations of strontium atoms rather than cesium to measure time; the most precise of these is accurate to within 1/15,000,000,000 of a second. This means that ...

Chinese scientists have built an ultra-precise clock that they hope will redefine the second Credit: Science Photo Library. This brings humans closer to redefining the second as a basic unit of time.

An incredibly precise timekeeping device that experts say could revolutionise British intelligence is being developed at a top secret lab in the UK. The Quantum Clock is expected to be rolled out ...