The experts who maintain the ominous Doomsday Clock said Tuesday that humanity is still as close as ever to global catastrophe, which could involve nuclear war, climate change, or maybe even ...

It’s going to start getting crowded on the moon, and we’ll soon need a precise lunar timekeeping system, a shared clock, to coordinate missions and prevent disasters. Time moves a bit faster on the ...

The hands of the Doomsday Clock are closer to midnight than ever before, with humanity facing a time of “unprecedented danger” that has increased the likelihood of a human-caused apocalypse, a group ...

Sign up for CNN’s Life, But Greener newsletter. Our limited newsletter series guides you on how to minimize your personal role in the climate crisis — and reduce ...

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 ...

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, a symbolic measure of humanity's proximity to catastrophic destruction, has been set at 89 seconds to midnight—the closest it has ever been, symbolizing humanity's shortest margin ...