A chunk of the Martian surface that made an unlikely voyage to Earth will be available to the highest bidder at Sotheby's ...

Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?

Traditionally, Mars was thought to have been cold and dry, with only brief periods of melting ice creating short-lived rivers ...

The discovery of more than 15,000 kilometers of ancient riverbeds on Mars suggests that the Red Planet may once have been ...

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

A rock on Mars spilled a surprising yellow treasure after Curiosity accidentally cracked through its unremarkable exterior.

The new images by the Curiosity rover on Mars show "dramatic evidence" of ancient groundwater in crisscrossing low ridges, ...

New discoveries by NASA's Curiosity Mars rover may not only explain why the Red Planet is a dry, lifeless desert, but that it ...

After its voyage past Mars, Mariner 4 maintained intermittent communication with JPL and returned data about the interplanetary environment for two more years. But by the end of 1967, the spacecraft ...

Scientists have discovered that thick clay deposits on Mars could have provided stable environments where ancient life might ...

A giant rock from Mars and a Jurassic-era dinosaur skeleton are set to go under the hammer at Sotheby’s this week.