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 ...

The next generation of atomic clocks "ticks" at the frequency of a laser. That is around 100,000 times faster than the microwave frequencies of the caesium clocks that currently generate the second.

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.