Sam Walters is the associate editor at Discover Magazine who writes and edits articles covering topics like archaeology, paleontology, ecology, and evolution, and manages a few print magazine sections ...

There are three types of rock found on Earth. These are igneous, metamorphic and sedimentary. Each rock type is formed in a different way. For example, the rock malachite is mostly made of the ...

The Great Transformation The Dolomites are about 250 millions years old and are composed mainly of sedimentary rocks and ...