Could Uranus and Neptune be full of rocks? One new study thinks so. Uranus and Neptune are two planets that have historically been classified and thought of as "ice giants," orbiting far out in the ...

In the Pilbara of Western Australia, some of Earth’s oldest rocks lie beneath the sky, as they have for billions of years. They are dark, weathered volcanic rocks, close to 3.5 billion years old, cut ...

Petrology is the study of rocks - igneous, metamorphic, and sedimentary - and the processes that form and transform them. Mineralogy is the study of the chemistry, crystal structure and physical ...