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

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

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

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

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

Scientists have discovered a hidden force deep inside Earth that is changing the length of our days.

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 ...

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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 ...

Newswise — The surface of Earth’s inner core may be changing, as shown by a new study led by University of Southern California. and University of Utah scientists that detected structural changes near ...

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 ...

A recent study revealed that Earth’s inner core is slowing down, prompting scientists to investigate further. Their research led to an unexpected discovery: that inner core is not entirely solid.