Earth takes a few milliseconds longer or shorter to turn on some days than on others, and the differences build up over ...

Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the ...

The inner core was discovered in 1936, and its size (about 20% of Earth's radius) is one of the best-constrained properties of the deep Earth. We use this information to estimate the core's ...

The middle-range shifts that unfold over several decades have been harder to explain.

A battle of forces, driven by the motion of Earth’s core, can explain small variations in the planet’s rotation, study finds.

The surface of the Earth's inner core may be changing, as shown by a new study by USC scientists that detected structural changes near the planet's center, published in Nature Geoscience. The changes ...

Tiny changes in Earth’s rotation may reveal a tug-of-war between its deformable inner core, liquid outer core and deep mantle ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The greatest center-of-a-Tootsie Pop search continues, as scientists probe Earth's inner core for more ...

Deep inside Earth is a solid metal ball that rotates independently of our spinning planet, like a top whirling around inside a bigger top, shrouded in mystery. This inner core has intrigued ...

Scientists think they may have solved the mystery of how helium-3, a rare element that has attracted interest as a potential fuel source for nuclear fusion reactors, is leaking out of Earth’s core, ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have uncovered a previously unknown doughnut-shaped region ...