NPR's Ayesha Rascoe talks to John Vidale, professor of earth sciences at the University of Southern California, about new research suggesting the rotation of Earth's inner core may be slowing down.

Scientists say they’ve confirmed Earth’s inner core has been slowing down. Here’s what it could mean — and why the topic has been the subject of fierce debate.

Is Earth's inner core solid or liquid? While the inner core is extremely hot, experts have known that it is solid for many ...

Scientists have proposed that Earth’s solid inner core (yellow in this diagram) rotates faster than the rest of Earth. A new study suggests the core’s rotation has recently paused, and is ...

Based on their analysis of seismic waves caused by similar earthquakes dating back to the 1960s, Yang and Song said they found that the inner core’s rotation seems to have “paused” between ...

July 9, 2025, saw the Earth spin through one of its shortest days on record a fleeting, nanosecond instant that passed ...

When we talk about Earth’s core, we’re typically referring to two things: the outer core, which is liquid and made up of molten iron and nickel; and the inner core, which is a solid ball of ...

The rotation of the Earth's inner core may be reversing, scientists have found in a study that sheds new light on geological processes occurring deep within our planet.

On July 9, 2025, scientists at the International Earth Rotation and Reference Systems Service (IERS) reported that the Earth ...

The Earth's inner core is a hot, dense and solid ball made of iron and nickel, located 3,200 miles (5,150 kilometers) below our feet. It is surrounded by a liquid iron-nickel outer core, encased ...

(NEXSTAR) – Deep in the center of the Earth is the inner core, which spans roughly 746 miles and is composed of primarily pure, solid iron, NASA explains. Though we’ve long believed – and ...

Earth’s solid metal core may no longer be spinning relative to the vast mass of the surrounding planet thanks to what appears to be a recent slowdown, according to the results of a new study.