China's Three Gorges Dam has effectively changed Earth's axis by nearly an inch since it was built nearly 18 years ago, ...

Long ago we humans defined a day as the time it takes Earth to make one rotation about its axis, with one sunrise and one sunset. Our predecessors partitioned that day into 24 hours. But if Earth’s ...

Runoff from irrigation has moved so much water from land to sea that Earth’s rotation might have measurably shifted. Computer simulations suggest that from 1993 through 2010, irrigation alone nudged ...