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 ...

Keep reading to learn more about Earth's different layers, its atmosphere ... Marilyn Perkins is the content manager at Live Science. She is a science writer and illustrator based in Los Angeles ...

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.

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.

Despite seeming like a relatively stable place, the Earth's surface has changed dramatically ... there are many horizontal layers, which are called strata. The study of strata is called ...