New findings from rock samples collected and examined by NASA's Mars Exploration Rover Opportunity have confirmed an ancient wet environment that was milder and older than the acidic and oxidizing conditions told by rocks the rover examined previously.
Earlier this week, NASA's Mars Exploration Rover began climbing "Solander Point," the northern tip of the tallest hill it has encountered in the mission's nearly 10 Earth years on Mars.
NASA's Mars Exploration Rover Opportunity has driven more than half of the distance needed to get from a site where it spent 22 months to its next destination.
Clay minerals - rocks that usually form when water is present for long periods of time - cover much more of Mars than previously thought, say Georgia Institute of Technology scientists.
NASA's stalwart Opportunity rover has captured an image of the Martian surface that is puzzling scientists.
NASA has released a panoramic image depicting the ruddy terrain around the outcrop where the space agency's Opportunity rover spent its most recent Martian winter.
NASA's Mars Exploration Rover Opportunity recently used a low sun angle to snap a memorable view of a large Martian crater.
Scientists have determined that a wind-driven "tumbleweed" Mars rover would be more than capable of effectively navigating rocky Martian terrain.
NASA's Opportunity rover has found veins of a mineral that appears to be gypsum, and which could only have been deposited by flowing water.
NASA's Mars rover Opportunity - recently arrived at the Endeavour crater - has found a rock that's different from anything it's seen before.
NASA’s Mars exploration rover has arrived at the Red Planet’s Endeavour crater which measures some 14 miles (22 kilometers) in diameter.
NASA is using cloud computing to optimize the efficiency of two rovers currently exploring the Martian landscape.