For many years, cesium atomic clocks have been reliably keeping time around the world. But the future belongs to even more ...

A study involving quantum collapse model has shown that time is not uniform but has tiny fluctuations that put limits on its ...

Smaller version Illustration of a conventional atomic fountain clock (left) next to NPL’s miniature atomic fountain clock.

The NPL has developed a miniaturised Atomic Fountain Clock that promises to make accurate timekeeping technology smaller.

For decades, atomic clocks have provided the most stable means of timekeeping. They measure time by oscillating in step with the resonant frequency of atoms, a method so accurate that it serves as the ...

NIST scientists have published results establishing a new atomic clock, NIST-F4, as one of the world’s most accurate timekeepers, priming the clock to be recognized as a primary frequency standard — ...

Now at 89 seconds to midnight, the clock is symbolic and has been maintained by the Bulletin of the Atomic Scientists since ...

Atomic clocks have long served as the benchmark for precise timekeeping by utilising the stable frequency of atomic transitions as a reference. Recent developments focus on harnessing coherent ...

On January 27th, the Bulletin of the Atomic Scientists will reveal the 2026 Doomsday Clock time. The announcement will occur ...

Researchers from the Purple Mountain Observatory in China released LTE440, short for Lunar Time Ephemeris, in a recently ...