A hidden battle of torques 3,000 miles beneath your feet decides whether today runs long or short.

Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the inner core appear to tug on the mantle, revealing a surprisingly dynamic world ...

Earth's inner core swings about 2.35 degrees over roughly 70 years, and its gravitational pull changes the length of a day by ...

It might sometimes feel like the days are starting to drag on, but scientists say that this isn't necessarily all in your head. In a new study, researchers from the University of Vienna and ETH Zurich ...

Rising sea levels are slowing Earth's rotation, lengthening how long an average day lasts. And the current rate of increase to a single average day—1.33 additional milliseconds per century—is ...

You might think the length of a day never varies—exactly 24 hours. You'd be wrong, at least if you count days in milliseconds, as physicists do. For about 30 years, scientists have known that the ...

Add Yahoo as a preferred source to see more of our stories on Google. Tuesday, July 22 will be the second-shortest day of the year, as Earth completes a full rotation in less time than usual. The ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Earth is illuminated against the blackness of space in this ...

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 ...

Climate change is lengthening our days because rising sea levels slow Earth's rotation. Researchers from the University of Vienna and ETH Zurich now show that the current increase in day length — 1.33 ...

Feel like Thursday was shorter? It might have been, but only by a millisecond. The Earth was predicted to complete its fastest rotations on July 9, July 10, July 22 and August 5, according to a Time ...