NASA's Opportunity Rover's Mars Marathon
NASA
<a rel="nofollow" class="external free" href="https://www.nasa.gov/press/2015/march/nasas-opportunity-mars-rover-finishes-marathon-clocks-in-at-just-over-11-years">https://www.nasa.gov/press/2015/march/nasas-opportunity-mars-rover-finishes-marathon-clocks-in-at-just-over-11-years</a>