The mission of the Mars rover Spirit is finally over after seven remarkable years roaming the cold Martian surface, NASA said today. Spirit landed on Mars in January 2004, and was expected at the time to last about three months. Instead, it kept going for more than five years.
"We always knew we would get to this point," said John Callas, the project manager for Spirit and its twin rover Opportunity, which is still operating. "We're here today because we wore Spirit out."
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