A metallic-looking rock sitting on the Martian surface has jolted a mission that was already rewriting what we know about the ...

Mars. From forming black holes to phantom dark energy, discover the cosmic mysteries astronomers uncovered last year.

Cassini confirmed that Titan is one of the only worlds in the solar system with stable liquid on its surface. But when ...

Early Mars seems to have had a protective atmosphere and liquid water in the form of oceans, rivers, and lakes. It may also ...