Quantum timekeeping has reached a new threshold, with trapped-ion clocks now accurate to the 19th decimal place and a ...
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, ...
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 ...