F4, the latest cesium fountain clock that now stands as one of the most accurate timekeepers in the entire world.

The ocean has long been treated as the world’s forgotten frontier—out of sight, out of mind, and dangerously overused. Yet ...

According to scientists at NIST in Boulder, their newest atomic clock, the NIST-F4, will help track time more precisely and ...

Experts—including a three-time marathoner, a running coach, an ultramarathon winner, and a podiatrist—weigh in on the right ...

May’s night sky is packed with astronomical events—find out when and where to look for meteor showers, ancient star clusters, ...

From strategically timed naps and caffeine to high-tech gadgets, these expert tips will help your body adjust to a new time zone.