It’s hard to believe that NASA’s Mars Rover Spirit which was only supposed to function for a short period of time had been going strong on the Red Planet for years. Sadly however its mission is coming to an end.
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From surviving bouts of amnesia to an escape from a sandy dungeon, sometimes it seemed that NASA's Mars rover Spirit had at least nine lives. But yesterday, after hearing not a peep since March 2010, NASA decided to cut communications with the rover, putting an end to a six-year Martian mission during which it traveled 7730.5 meters. Daredevil escapes aside, here we assess the scientific legacy of this robot geologist.
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http://www.xkcd.com/695/