Curiosity's mission was originally planned to last two years. It has now been extended indefinitely.
Just how long Curiosity could keep roving is an open question. The $2.5 billion robot is powered by a radioisotope thermoelectric generator (RTG), which should be able to continue converting the heat of plutonium-238's radioactive decay into electricity for a long time to come.
"I never get a straight answer on this, but I think it has 55 years of positive power margin," Grunsfeld said.
2011 + 55 = 2066, almost to Canada's bicentential.
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