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.

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.

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 ...

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