Engineers on NASA's Mars Exploration Rover team are investigating possible causes and remedies for a problem affecting the steering on Spirit.
Using an innovative technique to capture sharper images, NASA's Mars Global Surveyor spied tracks from Spirit on the surface of Mars.
As NASA's Spirit and Opportunity rovers resumed reliable contact with Earth, after a period when Mars passed nearly behind the Sun, the space agency extended funding for an additional six months of rover operations, as long as they keep working.
NASA's Mars Exploration Rover Opportunity has resumed using its rock abrasion tool.
NASA's Spirit rover is finding evidence that water thoroughly altered some rocks in Mars' Gusev Crater.
Spirit has climbed into rocky hills and Opportunity has gone into a crater but both rovers, for the time being, are operating with some restrictions.
Scientific findings from the NASA rover Spirit's first three months on Mars will be published Friday, marking the start of a flood of peer-reviewed discoveries in scientific journals from the continuing two-rover adventure.
Opportunity inches deeper into a crater while Spirit prepares to go up a hill.
On challenging slopes that NASA's Mars rovers began exploring this month, both Spirit and Opportunity have found new surprises for the folks back home.
NASA's Mars rovers are delighting scientists with their extra credit assignments.
In mission bonus time, Spirit and Opportunity continue to study rocks and craters, gathering clues about Mars' ancient environment.
Shutting down more completely overnight will conserve enough battery charge to add several hours of science operations during the day, but there is an increased risk scientific instruments may be damaged.
NASA's Mars Exploration Rover Opportunity has begun sampling rocks blasted out from a stadium-sized impact crater the rover is circling, and the very first one may extend our understanding about the region's wet past.
Scientists and engineers celebrated when they saw the first pictures NASA's Opportunity sent from the rim of a stadium-sized crater that the rover reached after a six-week trek across martian flatlands.
Spirit and Opportunity have completed their originally planned mission and are tackling extra-credit assignments.
Research indicates that static electricity on Mars could potentially cause increased dust adhesion to space suits and equipment.
NASA's Opportunity rover has examined an odd volcanic rock on the plains of Mars' Meridiani Planum region with a composition unlike anything seen on Mars before, but scientists have found similarities to meteorites that fell to Earth.
Both rovers are now operating with new "minds," after successful software updates› Spirit Software →
The Mars Exploration Rovers will work five months beyond their three-month prime mission.
Spirit has now completed 90 sols (martian "days") of surface operations, allowing mission scientists to check off the rover's last box for mission success.