Earth's inner core rotates in the same direction as the surface of the planet but rotates ever so slightly faster, completing one extra rotation every 1,000 years or so. Outer core ...

A wealth of new information about Earth’s inner core has surfaced in recent months. Scientists now have evidence that the planet’s innermost layer is changing shape.

Inner planets are the four planets closest to the Sun: Mercury, Venus, Earth and Mars. They are collectively characterized by a solid surface and small size relative to the outer gas giants ...

As Earth’s solid inner core spins, the molten outer core churns and sloshes. Their interactions generate magnetic energy, which unspools to enfold our planet in the magnetosphere. But the liquid ...