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 ...

On Earth, the solid inner core drives convection in the liquid outer core, which generates the planet’s magnetic field. If Mars has a similar core structure, why doesn’t it have a similar field?.

Scientists recently discovered that Earth 's inner core, which was long thought to be an unmoving ball of solid metal, might be a lot less rigid than we expected. Now, a new study suggests this ...

This undated illustration shows Earth's inner core. Scientists say that around 565 million years ago, the planet's solid inner core emerged, making life on Earth a possibility.

Earth's inner core is a solid ball of mostly iron and nickel. Measuring about 1,520 miles (2,440 kilometers), this inner core spins inside the outer core, an ocean of molten iron and nickel about ...

For a long time, scientists thought the Earth's inner core was a solid ball of metal, sort of like a planet within a planet that sits some 3,000 miles (4,828 kilometers) below the surface.

New research based on an iron and sulphur mixture mirroring the Red Planet’s inner core suggests that Mars’ deep interior could be solid, like Earth.

"This increased movement makes the inner core less rigid [and] weaker against shear forces," Lin said. This could explain why the inner core is "surprisingly soft," he added.