Opportunity is still going strong after 10 long, grueling years on Mars.
NASA noted on Thursday that Opportunity's health has not degraded noticeably during the past year.
The space agency said Opportunity is examining a rock that is unlike anything scientists have been before on Mars.
"Over the past decade, Mars rovers have made the Red Planet our workplace, our neighborhood," said John Callas, manager of NASA's Mars Exploration Rover Project. "The longevity and the distances driven are remarkable. But even more important are the discoveries that are made and the generation that has been inspired."
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