From a design perspective, the Doomsday Clock is remarkably economical. Four dots. Two hands. The universal language of ...

Researchers at the UK’s National Physical Laboratory (NPL) have created a tiny atomic fountain ...

Nuclear weapons, climate change and biological threats are the biggest concerns.

For decades, atomic clocks have provided the most stable means of timekeeping. They measure time by oscillating in step with the resonant frequency of atoms, a method so accurate that it serves as the ...

NIST scientists have published results establishing a new atomic clock, NIST-F4, as one of the world’s most accurate timekeepers, priming the clock to be recognized as a primary frequency standard — ...

Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards and Technology (NIST) campus in Boulder, Colorado. This month, NIST ...