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

That solid iron inner core of Earth may still hold liquid iron, according to a new study from the University of Utah. Scientists have used seismic waves to research Earth’s inner core ...

Earth’s core is pretty dynamic. Its spin speeds up and slows down based on how its two primary layers are behaving. As we improve the waveform techniques used to study the deepest layer ...

Scientists have identified another possible commonality between Earth and Mars: a solid inner core.

Scientists have long thought Earth's core is solid. Now they have some solid evidence.

Life on Earth became possible when the planet's solid inner core emerged hundreds of millions of years ago, according to new research. Scientists said that around 565 million years ago, the Earth ...

Atoms within the enormous ball of iron in Earth's inner core may move around much more than previously thought, which could explain recent findings about the core's surprising softness.

Researchers found that the Moon's inner core is about 310 miles wide, which is about 15% the diameter of the Moon.

An illustration depicting the layers of Earth's internal structure.. Earth's solid inner core may not be solid after all — at least not all the way through. Instead, it’s a hodgepodge ...