The liquid outer core, which extends to 1,795 miles above the solid core, Koper says, produces a protective field of magnetic energy. The molten metal cools as it approaches Earth’s rocky mantle ...

The Earth’s inner core is incredibly tricky to study, since it’s buried beneath thousands of miles of rock. New seismic studies suggest that it’s not just a solid ball of iron, as has been ...

Think Earth is just a static rock? Dive deep, and you'll find a dynamic world where metals leak, water seeps, and its insides ...

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 ...

As the Earth gradually cools, the inner core expands outwards at the surrounding iron-rich liquid "freezes." That said, it is still extremely hot, at least 5,000 Kelvin (K) (4726.85 degrees Celsius) .

The magnetic field and the liquid outer core are further stabilized by the more solid inner section. The inner core is made of solid iron-nickel about 3,000 miles below the surface of the Earth.

In reality, the core—which is over 4,000 miles wide—has two layers: a liquid outer core and a solid and dense inner core made mostly of iron that actually rotates.

What’s Next — Earth has a magnetic field because the liquid iron of the outer core also moves around thanks to convection, and that movement creates a giant electromagnet at the center of our ...

Beneath the mantle is a liquid iron outer core and solid iron inner core. Because Earth and Mars are both rocky ... dense core of liquid iron surrounded by a molten silicate layer—if the core ...

Not all of the iron became solid, so some liquid iron could be trapped inside." Advertisement Related: Earth's mysterious innermost core is a 400-mile-wide metallic ball ...