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 ...

but according to a new paper in the journal National Science Review, it may have been created when a Mars-sized planet ...

Earth science concentrates on investigating how the planet works and why. This field delves into the many layers of the Earth and explains how those pieces fit together into a cohesive structure.

A group of scientists has discovered a hidden layer of molten rock under the Earth’s surface ... has been writing for over a decade, covering science, gaming, and tech culture.