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

Thanks to a speed-up of Earth's rotation, the length of the astronomical day and the length of the clock day aren't quite ...

Put your observation skills to the test in this visual brain teaser challenge. Hidden among several clocks, only one is ...

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

One MRI scan can now reveal how quickly you're aging. Faster aging links to poor memory, chronic illness, and earlier death.

He developed technologies that helped pave the way for the Global Positioning System and made foundational discoveries that ...