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

First, a few basics. The Earth’s inner core, which is smaller than the moon, is solid iron and nickel. It’s surrounded by a layer of molten metal known as the outer core, followed by the Earth’s ...

A new, detailed probe of Earth's heart reveals that the rotating inner core doesn't just change in rotation speed – it also ...

Earth's inner core may have changed shape, according to researchers studying unknown transformations deep within the planet.

In this diagram, the red lines represent the edges of the tectonic plates that make up the Earth's crust. For example, iron is mined from the Earth's crust in quarries. It is a finite resource ...

When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right ... and generators to operate. In the Earth (see image below right), the ...

Figure caption, Lower diagram shows spectrum of light redshifted from a distant galaxy moving away from the Earth The upper diagram shows the absorption spectrum from a stationary galaxy with one ...