PICKS are stories from many sources, selected by our editors or recommended by our readers because they are important, surprising, troubling, enlightening, inspiring, or amusing. They appear on our ...

Since 2020, Earth has been rotating unusually fast on its axis, leading scientists to consider whether we should correct for ...

In an intriguing turn of events, scientists have been exploring the possibility of adding the first-ever negative leap second ...

Two days this summer have been unusually short, with the shortest expected on Aug. 5, leading global timekeepers to consider ...

Earth is spinning faster this summer, making the days marginally shorter and attracting the attention of scientists and ...

The story begins in 1835, when the first of what would become thousands of dams was built. These human-made reservoirs store ...

In a rare and unprecedented move, scientists and world timekeepers are considering reducing one second from Coordinated ...

As the Earth is spinning faster this summer, the days have become marginally shorter, attracting the attention of scientists and timekeepers.

New research shows that gold nanoclusters can mimic the key properties of the most accurate systems currently used in quantum ...

July 22 will be the second-shortest day of the year, as Earth completes a full rotation in less time than usual.

Is the Earth spinning faster? Is July 22 the shortest day ever? Here's what to know about the Earth's rotation and why is today the shortest day.