Chinese scientists create clock so precise it could redefine second - Optical clock measures time using light emitted by ...

Scientists are exploring a new type of optical atomic clock based on ytterbium-173 ions that could help define the future standard for measuring time.

DST continues to spark debate as Americans remain divided over whether to keep changing their clocks each year.

(NEXSTAR) – There was bipartisan legislation, committee hearings, efforts from multiple states, and even presidential support, but the U.S. still observed the beginning and end of daylight saving time ...

Daylight Saving Time, often shortened to DST, is one of those calendar events most people experience but rarely stop to fully understand. Each spring, millions of people reset their clocks, lose an ...

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the difference, showing that Mars clocks tick slightly faster—and fluctuate over the ...