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

Earth's rotation experiences slight variations in day length due to interactions within its inner core and mantle.

A study published in Nature identified the inner core as a key factor behind variations in day length that occur over several ...

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

What the research is about Earth's inner core is thought to consist mainly of iron, yet many questions remain about its ...

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

The length of Earth’s day drifts by a few milliseconds over decades, and a Nature paper from the University of Alberta argues ...

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

Add Yahoo as a preferred source to see more of our stories on Google. USC scientists have made a groundbreaking discovery about the nature of Earth's enigmatic inner core, revealing for the first time ...

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Watch a video about how Earth’s inner core changes shape over time, from the University of Southern California. Earth’s inner core is less solid than we once thought Earth’s inner core lies some 3,000 ...

WASHINGTON, D.C. — Earth’s inner core, a solid metal ball gyrating within the molten outer core, may be both slowing down and changing shape. Recent analyses of earthquake waves have suggested that ...