A leap second is a one-second modification that is sometimes used with atomic clocks, whenever there is a change in Earth's ...

What if you build a clock that displayed the time not just on its own, but in its shadows as well? [Lewis] from [DIY Machines ...

Amazon Prime Video’s Countdown doesn’t waste a second—literally. In a landscape crowded with high-octane thrillers, the ...

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 ...

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 ...

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 claims that this will enhance accuracy, fairness, and security across ...

Marie Curie worked with radioactive material with her bare hands. More than 100 years later, Sophie Hardach travels to Paris to trace the radioactive fingerprints she left behind.

A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known ...