By discovering carbonate rocks, NASA's Mars rovers may have unlocked the key to understanding the fate of the Red Planet's ...

Sedimentary rock is formed by the accumulation of minerals and other material. As rocks at the earth's surface are broken down, or “weathered,” the sediment is moved by forces such as water and wind ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Why don’t rocks burn? – Luke, age 4, New Market, ...