The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

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

Conventional knowledge suggests our planet has four main layers; the crust (where we ... the long-standing debate on what was happening inside Earth’s core. Due to no instruments existing ...

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

The Earth is made up of different layers: Therefore ... The movement of the plates and the activity inside the Earth, is called the theory of plate tectonics.

Keep reading to learn more about Earth's different layers, its atmosphere, and what makes the "blue planet" unique. Earth is made out of different layers, and those layers get hotter and more ...