Researchers at the U.S. National Institute of Standards and Technology have built a compact laser system that suppresses frequency noise by more than 140 decibels, a performance level that could ...

The Doomsday Clock has been set at 85 seconds to midnight, the closest it has ever been to midnight, according to the Bulletin of the Atomic Scientists. The clock has moved down from 89 seconds last ...

To find out how clock accuracy is verified and which reference is used for comparison, we visited the Belarusian State ...

In 2008, a team of UCLA-led scientists proposed a scheme to use a laser to excite the nucleus of thorium atoms to realize extremely accurate, portable clocks. Last year, they realized this ...