Source - NASA Science News for May 15, 2015
On Earth, a fast runner takes a few hours to complete a marathon. On Mars, it takes about 11 years. NASA's Opportunity rover crossed the finish line of the first "Martian Marathon" in 2015.
The complete article can be found here: http://science.nasa.gov/
A companion video is posted below and can also be viewed at: https://www.youtube.com/watch?
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