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 ...

The return to "standard time" is better for our health according to sleep scientists, but the time change can be disruptive, and our bodies must also adjust to more hours of darkness as we head ...

It’s no secret that we live in a sleep-deprived society. More than a third of Americans don’t get enough shuteye, defined as a minimum of seven hours a night. It’s not just the U.S.: much of the ...

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 ...