Physicists are quietly rewriting one of the most basic units in science, using a new generation of optical clocks that can keep time so precisely they barely lose a beat over the age of the universe.

The Chicago Bears were headed to the locker room, and the Detroit Lions waved them back onto the field. The Lions benefitted from a 10-second clock runoff late in the first half of Sunday's home ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Scientists have taken a major step toward the ambitious global goal ...

Major League Baseball wants to institute a 14-second pitch clock with the bases empty and a 19-second timer with runners on, according to sources familiar with the situation. The two numbers were ...

The Bulletin of the Atomic Scientists shifted the hands of the symbolic clock to 89 seconds to midnight, citing the threat of climate change, nuclear war and the misuse of artificial intelligence. By ...

This accurate one-pulse-per-second clock is made with a few common parts and driven from a 50 or 60 Hertz mains supply but with no direct connection to it. A beep or metronome-like click and/or a ...