A crystal clear photograph taken by the Opportunity rover shows an unidentified object sitting nearby.
Data collected by the Curiosity rover has suggested that Mars could have supported life for a very long time.
The rover has come across what scientists believe to be an iron-nickel meteorite on the Martian surface.
Curiosity has discovered minerals from over several million years of the Red Planet's geological history.
NASA's Curiosity rover has taken a closer look at an odd-looking meteorite lying on the surface of Mars.
NASA's exploratory rover has recorded an impressive panoramic image from the surface of the Red Planet.
The alleged skeletal artifact appeared following an 'enhancement' of an image from the Curiosity rover.
A mysterious spike of methane picked up by the Curiosity rover two years ago has yet to reoccur.
NASA's Curiosity rover has photographed a huge wall of sand on the edge of the Martian desert.
NASA's Curiosity rover has discovered a large amount of water beneath Buckskin Rock in the Marias Pass.
NASA's Curiosity rover has found evidence of liquid water forming near to the planet's surface.
NASA has revealed that the rover has found further evidence of organic molecules on the Red Planet.
The rover's instruments have picked up unequivocal evidence that there really is methane on Mars.
Conspiracy theorists claim to have identified the shadow of a man working on the Curiosity rover.
NASA's exploratory rover has discovered mysterious 'belches' of methane gas on the surface of Mars.
Curiosity has located a ledge of rocks that could hold important clues about the origins of the planet.
NASA's Curiosity rover has finally arrived at its primary destination after more than two years on Mars.
Eagle-eyed Internet users have spotted an alleged 'thigh bone' in images taken by NASA's Curiosity rover.
The successor to the Curiosity rover will be fitted with an array of sophisticated science instruments.
The latest in a long line of impossible objects sighted on Mars is a rock in the shape of a T. rex skull.