The first NASA astronauts to set foot on Mars will aim to establish a research-and-operations base, not a permanently inhabited colony.
The first mission in a joint European-Russian campaign to look for life on Mars is scheduled for launch on Monday.
This eerie portrait of Mars' moon Phobos in ultraviolet light was snapped by the NASA orbiter MAVEN as their orbits crossed paths.
NASA's Opportunity Mars rover is tackling some of the toughest terrain the robot has encountered in its twelve years on the Red Planet.
On Jan. 25, NASA's Mars rover Opportunity is celebrating an amazing 12 years on the Red Planet. Here are just a handful of its biggest discoveries to date.
There are few more potent reminders that Mars used to be a wet world than seeing ancient, dried up river beds etched into the red planet's surface.
As NASA's Curiosity rover investigates Mars dunes up close, we're beginning to scratch the surface of a larger, sandy mystery.
In a decidedly wintry-looking scene, frost-filled fractures fills a crater near the north pole of Mars -- as observed by NASA's Mars Reconnaissance Orbiter.
+ Load More