There's a new record holder for the most accurate clock in the world. Researchers at the National Institute of Standards and Technology (NIST) have improved their atomic clock based on a trapped ...

World’s most accurate clock requires a 2-mile laser beam It measure a second down to the 19th decimal. Andrew Paul Jul 14, 2025 4:09 PM EDT ...

According to scientists at NIST in Boulder, their newest atomic clock, the NIST-F4, will help track time more precisely and help put global time on a more accurate frequency.

This is the world's most accurate clock -- for now, anyways Improvements in clocks are setting the stage for a redefinition of the second.