The new Doomsday Clock time has been set by the Bulletin of the Atomic Scientists. Here’s what it means.

Add Yahoo as a preferred source to see more of our stories on Google. It's time to fall back. Daylight saving time ends this weekend. On Sunday, Nov. 2, at 2 a.m., clocks will "fall back" to standard ...

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 ...

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the difference, showing that Mars clocks tick slightly faster—and fluctuate over the ...

When do clocks change? Daylight saving time ends at 2 a.m. on Sunday, Nov. 2, as clocks fall back one hour. It will mean most people in the U.S. and Canada gain an extra hour of sleep as standard time ...