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 ...

While most of us take the ground beneath our feet for granted, written within its complex layers, like the pages of a book, is Earth's history.

There's many different layers to the Earth's atmosphere, but 75% of Earth's mass is actually going to be residing in the troposphere, where we are located. Also, we see all of Earth's weather occur in ...