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.

A new study of decades worth of seismogram data shows that the surface of Earth’s iron and nickel core is more malleable than scientists thought.

Giant regions of the mantle where seismic waves slow down may have formed from subducted ocean crust, a new study finds.

Led by Curtin University geologists Chris Kirkland and Tim Johnson, a research team unearthed this primeval crater beneath ...

Earth's diameter is about 7,900 miles. The planet's internal structure comprises four layers: a rocky crust on the outside, then a rocky mantle, an outer core made of magma and a solid inner core.

Giant regions of the mantle where seismic waves slow down may have formed from subducted ocean crust, a new study finds.

These findings could lead to a better understanding of the inner workings of our planet and how life here will evolve over time. The Earth is made up of different layers. The outermost is the ...

Earth's innermost layer is called the core ... of 9,000 degrees Fahrenheit (5,000 degrees Celsius). In the inner core, the pressure is so massive that the ultra-hot metal turns solid.

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

This inner core is surrounded by a liquid outer shell of the same composition, enclosed by the mantle—a thick layer that begins about 30 kilometers beneath the Earth's surface and extends to a ...

A groundbreaking study reveals that the Moon has a solid inner core with a density comparable to iron, reshaping our ...

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.