A new atomic clock developed by the National Institute of Standards and Technology (NIST) has been set in motion, boasting unparalleled precision. The “fountain”-style clock is now being used to help keep official U.S. time, marking a significant achievement for researchers who spent years perfecting its design.
According to experts, the new clock’s reliability is staggering, with an error margin of less than one second even if it had started running 100 million years ago. This level of precision underscores the significance of NIST’s latest innovation in timekeeping, bringing it to a whole new level of accuracy and reliability.
Source: https://www.washingtonpost.com/science/2025/05/17/nist-atomic-clock-time-cesium