The soft soil exposed when wheels of NASA's Mars Exploration Rover Spirit dug into a patch of ground dubbed "Troy" exhibit variations in hue visible in this image, in which the colors have been stretc...
The soft soil exposed when wheels of NASA's Mars Exploration Rover Spirit dug into a patch of ground dubbed "Troy" exhibit variations in hue visible in this image, in which the colors have been stretc...
After five years, the Mars Exploration Rovers are still studying Mars. Take a closer look at how they work.
Rover Project Manager John Callas explains how getting a test rover stuck in a sandbox on Earth may help get Spirit out of a predicament on Mars.
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While the Spirit rover is embedded on Mars, engineers are working to create a 'Mars-scape' on Earth to test an escape plan.
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