On January 24th, 2004 NASA’s Opportunity Rover touched down on Mars with its sister rover, Spirit. Today, eight years later, Opportunity is still going, well beyond expected performance. Spirit died last year after getting mired in the sand in such a way that it could not use its solar panels to recharge . Both rovers were not expected to last beyond a 90 working period. But they ended up lasting well beyond their operation period and Opportunity still rolls along. With this “opportunity” NASA scientists have been using the rover to search out as much information as they can on the Endevour Crater.
Opportunity has traveled over 21 miles since landing (poor Spirit only covered a little under 5 miles). Detailed trverse maps can be found on NASA’s webpage.