World's first thorium-229 nuclear clock shows potential for ultra-precise timekeeping and fundamental physics tests.

Time feels familiar. It marks every moment of daily life, from the ticking of a wall clock to the changing numbers on a ...

No matter the item on my list of childhood occupational dreams, one constant ran throughout: I saw myself using an old-fashioned punch clock with the longish time cards and everything. I now realize ...

Add Yahoo as a preferred source to see more of our stories on Google. The Bulletin of the Atomic Scientists members, from left, Jon B. Wolfsthal, Asha M. George and Steve Fetter reveal the Doomsday ...

Keeping perfect time is far trickier than it sounds. The world’s best clocks that are used for GPS navigation, satellite communication, and testing fundamental physics depend on carefully controlled ...

The days are shortening and the nights are lengthening — a sure sign summer is nearing its end. And with the end of summer comes the time to dial clocks back from daylight saving time to standard time ...