 |  |  |  |  NASA's Mars Exploration Rovers' discovery of evidence of past water on Mars was the top scientific "Breakthrough of the Year," according to the journal Science.

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| Rovers Look Forward to A Second Martian Spring
August 8, 2006 is winter solstice on Mars, the shortest day of the Martian year.
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| Spirit Struggles to Survive the Martian Winter
More than two years after landing on Mars, Spirit can only drive on five wheels.
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| | 01.24.06 - Mars Rovers Advance Understanding of the Red Planet
NASA's Mars rovers, Spirit and Opportunity, have been working overtime to help scientists better understand ancient environmental conditions on the red planet.
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| | 12.05.05 - NASA's Mars Rovers Continue to Explore and Amaze
NASA's durable twin Mars rovers have successfully explored the surface of the mysterious red planet for a full Martian year (687 Earth days).
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| | 11.29.05 - NASA Rover Helps Reveal Possible Secrets of Martian Life
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.
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