Earth’s quicker spin challenges civil time as experts weigh a first negative leap second to keep satellites, networks, and ...

Earth takes 24 hours to complete a full rotation in a standard day, equal to exactly 86,400 seconds. July 9 was the first of three days in which a millisecond or more could be shaved off the clock on ...

WASHINGTON — Wednesday will be slightly shorter than usual, but you probably won't notice the difference even if you're watching the clock closely. Earth is expected to complete a full rotation on ...

Right now, we're zooming through space at incredible speeds, so why aren't we dizzy or flying off into space?  An expert ...

Pumping groundwater appears to have a greater consequence than ever previously thought. But now—thanks to a study published in the journal Geophysical Research Letters— we can see that, in less than ...