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Five Years On, Rovers Continue to Make Discoveries May 21, 2009 UPDATE More than four years after its expected demise, the Mars rover Opportunity continues to send back valuable data as it crawls across the planet's surface. In a new study, researchers analyzing that data have found evidence that an entire Oklahoma-sized region of Mars called the Meridiani planum was shaped by years of wind and water flows. Mars Rover Tools INTERACTIVE The first geologist on Mars isn't human, but a 380-pound automaton called Spirit. View a NASA animation of Spirit's journey from launching pad to Mars, and learn about the instruments on the robotic explorer. Slide Show: Images From Mars PHOTO GALLERY After their seven-month journeys through space, Spirit and Opportunity began recording the most detailed images of Mars' surface ever captured.	Main: Mars Exploration Rovers   Interactive: Rover Tools   Slide Show: Images from Mars   Archive   Lesson Plan   Rovers on Mars Mars Polar Lander In-depth Coverage of NASA's failed 1999 mission to the Red Planet NOVA:Mars Two NOVA episodes chronicle the journey to Mars

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