WASHINGTON — Atomic scientists set their "Doomsday Clock" on Tuesday closer than ever to midnight, citing aggressive behavior by nuclear powers Russia, China and the United States, fraying nuclear ...

To find out how clock accuracy is verified and which reference is used for comparison, we visited the Belarusian State Institute of Metrology (BelGIM), where most of the national standards are kept.

Former New York City Mayor Rudy Giuliani has been hospitalized, according to a statement posted on Sunday. Giuliani is in critical but stable condition. 85-year-old shot daughter, wife and himself; ...

Time is almost up on the way we track each second of the day, with optical atomic clocks set to redefine the way the world measures one second in the near future. Researchers from Adelaide University ...

Adelaide University researchers have successfully tested a new type of portable atomic clock at sea for the first time, using technology that could help power the next generation of navigation, ...

Physicists have found that certain quantum collapse models, if correct, imply an inherent uncertainty in time itself, likely ...