10 Years of Spirit and Opportunity: The Mars Exploration Rovers

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10 Years of Spirit and Opportunity: The Mars Exploration Rovers

<img src="http://media-1.web.britannica.com/eb-media//93/93293-004-F3899A13.jpg" alt="" width="275" height="206" align="right"/>Today marks the 10th anniversary of the launch of NASA's Mars Exploration Rover Spirit. Britannica commemorates the occasion with a look at the mission and its achievements.

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