Quantum clocks break energy limits, unlocking ultra-precise timekeeping with far-reaching tech, AI, and navigation impacts.

Back in 2023, scientists were already puzzled by the Earth’s accelerating rotation, while some speculated that global warming ...

In this work, a rubidium fountain clock through an 84km commercial optical fiber link was used to steer the atomic time scale generated by a clock ensemble with 2 hydrogen masers and 8 high ...

Earth's rotation is speeding up, leading to shorter days and potential timekeeping adjustments. Scientists predict that by ...

“The optical clock community is strongly motivated to obtain the best possible set of measurements before the SI second is ...

A Bulletin short fiction contest Announcing the Bulletin‘s new short fiction contest… Over the decades, the Bulletin of the Atomic Scientists has published the smartest minds in the fields it covers, ...

Iran's President Masoud Pezeshkian has given his approval to legislation halting collaboration with the UN's nuclear ...

A landmark nuclear deal, a dramatic withdrawal, and a second chance blown apart by bombs, this is how US-Iran nuclear ...

India is preparing to make Indian Standard Time (IST) the only official time for all legal and official activities. The government says this will improve accuracy, fairness, and security across all ...

Quantum sensing specialist Aquark Technologies has completed a second trial of its AQlock atomic clock system, facilitated by the Disruptive Capabilities and Technologies Office (DCTO) of the UK Royal ...

LINCOLN, Neb. — Nebraska Gov. Jim Pillen has endorsed which way the state should lock the clocks, putting his weight behind ending twice-a-year clock changes by using permanent standard time.

Abstract: The frequency stability of an atomic fountain clock was significantly improved by employing an ultra-stable local oscillator and increasing the number of atoms detected after the Ramsey ...