Add Yahoo as a preferred source to see more of our stories on Google. You're unlikely to miss the 1.25 milliseconds that will make Aug. 5 one of the shortest days ever. Earth's rotation is randomly ...

Earth never stops moving. Right now, as you read this, the planet beneath your feet is spinning at incredible speed. At the equator, you are traveling through space at roughly 1,670 km/h (1,037 mph), ...

Earth's rotation is randomly speeding up, and nobody is quite sure why. These speedups, which have occurred several times over the last few years, haven't had any effect on daily life, but they also ...

Earth will complete its daily rotation between 1.25 and 1.51 milliseconds faster than usual, and scientists aren't quite sure why. Joe is a freelance journalist. It all started with a long-running ...