A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known as NIST-F4, ...

Add Yahoo as a preferred source to see more of our stories on Google. Jon Wolfsthal, director of global risk at the Federation of American Scientists (FAS), Asha George, executive director of the ...

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.

The "Doomsday Clock" which represents how near humanity is to catastrophe moved closer than ever to midnight on Tuesday as concerns grow over nuclear weapons, climate change and disinformation. The ...

CHICAGO -- At the dawn of the nuclear age, scientists created the Doomsday Clock as a symbolic representation of how close humanity is to destroying the world. On Tuesday, nearly eight decades later, ...

Earlier on Jan. 26, the hands of the Doomsday Clock were set closer to midnight than they've ever been in its history. Citing a worldwide "failure of leadership," the Bulletin of the Atomic Scientists ...

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 ...

Scientists who track global threats to humanity have pushed the symbolic Doomsday Clock closer to catastrophe than at any point since it was created. The Bulletin of the Atomic Scientists announced on ...

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 ...