04.12.06 - NASA's Mars rover Spirit has reached a safe site for the Martian winter, while its twin, Opportunity, is making fast progress toward a destination of its own.
03.17.06 - NASA's long-lived Mars rovers demand lots of care as they age and the Martian winter approaches.
01.24.06 - NASA's Mars rovers, Spirit and Opportunity, have been working overtime to help scientists better understand ancient environmental conditions on the red planet.
12.05.05 - NASA's durable twin Mars rovers have successfully explored the surface of the mysterious red planet for a full Martian year (687 Earth days).
11.29.05 - Life may have had a tough time getting started in the ancient environment that left its mark in the Martian rock layers examined by NASA's Opportunity rover.
09.01.05 - Working atop a range of Martian hills, NASA's Spirit rover is rewarding researchers with tempting scenes filled with evidence of past planet environments.
06.06.05 - Engineers and mission managers for NASA's Mars Exploration Rover mission cheered when images from the Martian surface confirmed Opportunity had successfully escaped from a sand trap.
05.24.05 - NASA's Mars rover Opportunity is trying to escape from a sand trap, while its twin, Spirit, has been busy finding new clues to a wet and violent early Martian history.
05.06.05 - Mars rover engineers are using a testing laboratory to simulate specific Mars surface conditions where NASA's rover Opportunity has spun its wheels in a small dune.
04.29.05 - From a ridgeline vantage point overlooking slopes, valleys and plains, NASA's Mars Exploration Rover Spirit has returned its latest color panorama of the martian landscape.
04.21.05 - NASA's Mars Exploration Rover Spirit is taking movies of dust devils -- whirlwinds carrying dust -- scooting across a plain on Mars.
04.05.05 - NASA has approved up to 18 more months of operations for Spirit and Opportunity
03.15.05 - NASA has suspended use of one of the mineral-identifying tools on the Opportunity Mars rover .
03.02.05 - On three consecutive days, Opportunity accomplished unprecedented feats of martian motion.
02.15.05 - NASA's Spirit rover found a new class of water-affected rock, while its twin, Opportunity, finished inspecting its own heat shield and set a new martian driving record.
01.19.05 - Opportunity has found an iron meteorite, the first meteorite of any type ever identified on another planet.
12.02.04 - The most dramatic findings so far from NASA's twin Mars rovers -- telltale evidence for a wet and possibly habitable environment in the arid planet's past -- passed rigorous scientific scrutiny for publication in a major research journal.
11.11.04 - Operators of NASA's Mars Exploration Rover Opportunity have determined that a proposed route eastward out of "Endurance Crater" is not passable.
11.04.04 - All the scientific tools on NASA's two Mars Exploration Rovers are still working well, a full 10 months after Spirit's dramatic landing.
10.29.04 - A view of the sundial-like calibration target on NASA's Mars Exploration Rover Spirit is the 50,000th image from the twin rovers that have been exploring Mars since January.