A new atomic clock is so stable and reliable that it may be used to redefine our measurement of the second.

The relative abundances of magnesium isotopes in the Allende meteorite reveal the precise chronology of the early Solar System — a geochemical second hand on the clock of creation.

Your "biological clock" may be mostly in your head–and an actual clock can trigger it researchers from Florida State University have discovered. Through two experiments, they sought to test ...

Y es, someone’s actually building an honest-to-goodness 10,000-year clock, or a clock that’ll run for 10,000 years. If you’re a Neal Stephenson fan (like me) and you’ve read his last novel ...

While advancing the clock by one symbolic second might not seem like the end of the world, Holz offered a different perspective. "Because the world is already perilously close to the precipice, any ...

The rules include a first-ever pitch clock, the elimination of the shift, bigger bases and a limit to how many times a pitcher can disengage from the rubber.

Have you ever looked at a clock suddenly and noticed that the second hand stood still for longer than you think it should have? Maybe a touch longer than a second? You have probably already ...

For over 75 years, the clock and its keepers — who once included Einstein and Oppenheimer — reflect how close humanity is coming to the brink.