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.
09.13.07 - NASA's Mars Exploration Rover Opportunity finished the last step of a test in-and-out maneuver checking wheel slippage at the rim of Victoria Crater today.
09.11.07 - Today, NASA's Mars Exploration Rover Opportunity entered Victoria Crater for the first time.
09.11.07 - Two months after sky-darkening dust from severe storms nearly killed NASA's Mars exploration rovers, the solar powered robots are awake and ready to continue their mission.
08.24.07 - After six weeks of hunkering down during raging dust storms that limited solar power, both of NASA's Mars Exploration Rovers, Spirit and Opportunity, have resumed driving.
08.07.07 - Slight clearing of still-dusty Martian skies has improved the energy situation for both Spirit and Opportunity, allowing controllers to increase the rovers' science observations.
07.31.07 - Rover engineers are growing increasingly concerned about the temperature of vital electronics on NASA's Mars Exploration Rover Opportunity while the rover stays nearly inactive due to a series of dust storms that has lasted for more than a month.
07.26.07 - As of Thursday, July 26, NASA rovers Spirit and Opportunity are both enduring levels of reduced power supply.
07.20.07 - Having explored Mars for three-and-a-half years in what were missions originally designed for three months, NASA's Mars rovers are facing perhaps their biggest challenge.› View This Video
07.03.07 - A giant dust storm brewing for more than a week on Mars has become worse and is affecting surface operations of the Mars Exploration Rovers, Spirit and Opportunity.
05.03.07 - NASA's Mars Rover Spirit has found evidence of an ancient volcanic explosion. One strong clue is a bomb sag, which on Earth is found when a rock blown skyward by a volcanic explosion falls into soft deposits.
03.14.07 - Some bright Martian soil containing lots of sulfur and a trace of water intrigues researchers who are studying information provided by NASA's Spirit rover.
02.07.07 - NASA's durable Mars Exploration Rover Opportunity is the first robot to travel 10 kilometers on Mars. It reached that total (6.2 miles) during a drive on Feb. 6, seen above.› Full image and caption
12.28.06 - NASA's twin Mars rovers, nearing the third anniversary of their landings, are getting smarter as they get older.
12.13.06 - Layers on Mars are yielding history lessons revealed by instruments flying overhead and rolling across the surface.
09.27.06 - NASA's Mars Rover Opportunity has arrived at the rim of a crater approximately five times wider than a previous stadium-sized one it studied for half a year.
09.19.06 - On Monday, NASA's Mars rover Opportunity got to within about 160 feet of the rim of the half-mile-wide Victoria Crater, the rover's destination since late 2004.
09.06.06 - NASA's Mars rover Opportunity is closing in on what may be the grandest overlook and richest science trove of its long mission.