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 ...

The Earth is made up of different layers: Therefore, instead of tectonic plates moving because of the convection currents, evidence suggests it is the plates that drive the convection. Slab pull ...

The beginnings of a strange layer of molten rock deep inside the Earth may have finally been figured out by geoscientists.

Much has been learned about the geology of the Grand Canyon and about the history of life on earth ... layers of rock lie at an angle relative to the layers of rock above. The layer labeled ...

There's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is composed of several layers held together by intense forces of gravity.