05.11.09 - The five wheels that still rotate on NASA's Mars Exploration Rover Spirit have been slipping severely in soft soil during recent attempts to drive, sinking the wheels about halfway into the ground.
04.15.09 - Heading into a period of the Martian year prone to major dust storms, the team operating NASA's twin Mars rovers is taking advantage of eye-in-the-sky weather reports.
04.20.09 - After NASA's Mars Exploration Rover Spirit had a bout of temporary amnesia on Friday, April 17 it rebooted its computer.
04.13.09 - The team operating Spirit is examining data received from the rover to diagnose why the rover apparently rebooted its computer at least twice over the April 11-12 weekend.
03.18.09 - On a plain that stretches for miles in every direction, the panoramic camera on NASA's Mars rover Opportunity has caught a first glimpse on the horizon of the uplifted rim of the big crater that has been Opportunity's long-term destination for six months.
03.05.09 - Loose soil piled against the northern edge of a low plateau has blocked Spirit from taking the shortest route toward its southward destinations for the upcoming Martian summer and following winter.
02.12.09 - A small but important uptick in electrical output from the solar panels on Spirit this month indicates a beneficial Martian wind has blown away some of the dust that has accumulated on the panels.
02.02.09 - Spirit resumed driving Saturday after engineers gained confidence from diagnostic activities earlier in the week evaluating how well the rover senses its orientation.
01.28.09 - Diagnostic activities performed by Spirit on Thursday, Jan. 29 narrowed the range of factors that may have contributed to its unexpected behavior earlier in the week.
01.12.09 - Public events during the next two weeks will share the adventures of the still-active NASA Mars rovers Spirit and Opportunity.
12.29.08 - NASA rovers Spirit and Opportunity may still have big achievements ahead as they approach the fifth anniversaries of their memorable landings on Mars.
11.14.08 - After assessing data received from NASA's Mars Exploration Rover Spirit on Thursday, mission controllers laid out plans for the rover to conserve its modest energy during the next few weeks.
11.13.08 - Spirit communicated via the Mars Odyssey orbiter today right at the time when ground controllers had told it to, prompting cheers among the rover team at JPL.
11.10.08 - A dust storm on Mars has cut into the amount of sunlight reaching the solar array on NASA's Mars Exploration Rover Spirit, leaving the rover in a vulnerable state.
09.22.08 - NASA's Mars Rover Opportunity is setting its sights on a crater more than 20 times larger than its home for the past two years.
08.29.08 - NASA's Mars Exploration Rover Opportunity has climbed out of the large crater that it had been examining from the inside since last September.
08.26.08 - NASA's Mars Exploration rover Opportunity is heading back out to the Red Planet's surrounding plains nearly a year after descending into a large Martian crater to examine exposed ancient rock layers.
04.23.08 - A small motor in the robotic arm of NASA's Mars Exploration Rover Opportunity that began stalling occasionally more than two years ago has become more troublesome recently.
02.15.08 - Like salt used as a preservative, high concentrations of dissolved minerals in the wet, early-Mars environment known from discoveries by NASA's Opportunity rover may have thwarted any microbes from developing or surviving.
09.26.07 - NASA's Mars Exploration Rover Opportunity has reached its science team's first destination for the rover inside Victoria Crater, information received from Mars late Tuesday confirms.