New evidence of ancient rivers suggests Mars may have been a "blue planet," thanks to an ocean spanning its entire northern ...

On January 25, 2004, NASA's Opportunity rover landed on Mars! This was the second of NASA's twin Mars Exploration Rovers to ...

Learn more about the hunt for bacteria on Mars and how astronauts will need to make sure they aren't bringing any dormant ...

Ancient shoreline features hint that water on Mars once formed a vast ocean.

Advances in technology have reopened the debate over terraforming Mars, shifting it from an impossible dream to a long-term scientific and ethical question.

A new study has examined how future human missions to Mars could access one of the planet's most vital resources—water. The ...

Mars has an active, electrically charged surface where dust storms and spinning dust devils regularly move and reshape the landscape. Mars is often portrayed as a dry, empty world, but the planet is ...

ESA's first mission to another world, the Mars Express orbiter, began circling the Red Planet on June 2, 2003. Ever since, ...

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very ...

Despite its small size, Mars seems to have a huge impact on the orbital cycles that govern Earth’s climate, especially those ...