Mars Rovers: Scientific Staying Power on the Red Planet

摘要

After more than three and a half years of operation, NASA's twin Mars rovers continue to thrive, showing no signs of stopping as they relay a wealth of valuable data back to Earth about that ancient world's past, present and future.rnNASA announced Oct. 15 that it was extending, for a fifth time, the activities of the trail-blazing robots — Spirit and Opportunity — perhaps through 2009.