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.

Add Yahoo as a preferred source to see more of our stories on Google. Atomic clock A clock built by a team led by researchers at the National Institute of Standards and Technology (NIST) has been ...

LANCASTER COUNTY, Pa. (WHTM) — A Guinness World Record-winning clock is now on display at the National Watch and Clock Museum in Lancaster County. According to the museum, the Burgess Clock B received ...

Researchers at the U.S. National Institute of Standards & Technology (NIST) say they have created the most accurate atomic clock to date — one that can measure time down to the 19th decimal place.

A clock built by a team led by researchers at the National Institute of Standards and Technology (NIST) has been estimated to be 41 percent more accurate than the previous timekeeping record holder.