The Earth's inner core was once liquid, but has turned solid over time. As the Earth gradually cools, the inner core expands outwards at the surrounding iron-rich liquid "freezes." ...

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.

USC scientists have made a groundbreaking discovery about the nature of Earth’s enigmatic inner core, revealing for the first time that this 1,500-mile-wide ball of iron and nickel is changing.

The surface of Earth's inner core may be shape-shifting, new research suggests. The study, published Feb. 10 in the journal Nature, looked at earthquake waves that have skimmed the edge of the ...

Scientists have debated for years about what's going on with Earth's inner core. A new study offers compelling evidence that the inner core reversed direction and is slowing down. The shift ...

As much as we have explored and modeled our planet, there are a number of mysteries that surround the Earth's inner core. This isn't that surprising, as it's pretty difficult to study a region ...

The inner core is made of solid iron-nickel about 3,000 miles below the surface of the Earth. Scientists believe that the inner core’s rotation began to slow down in 2010 , but what that really ...

Earth’s inner core isn’t just slowing; it’s also shape-shifting, study finds. Feb. 11, 2025. Show Comments. Climate & Environment Science & Medicine World & Nation Breaking News.

The latest discoveries about the inner core have fueled vigorous disagreements among the world's top Earth scientists and given rise to competing theories of varying credibility, Vidale says. Some ...

Earth’s inner core — like a planet inside another planet — appears to move to its own beat. A team of scientists previously found that it has been spinning at slightly different speeds than ...