CNN — (CNN) — Here’s some background information about Mars exploration. The United States, Soviet Union and China are the only three countries to land a spacecraft on Mars. There have been nine ...

Space questions everything about what we know about existence and consists of gigantic stars, icy comets and distant worlds ...

Did you know that Mars at opposition is a special time when Earth and Mars are closest? This happens when Earth passes ...

Life on Mars is a dream long held – and not just for David Bowie. The idea of settling on the Red Planet has been around for ...