10 febrero 2015
NASA’s Mars Exploration Rover Opportunity is nearing a location on Mars at which its driving distance will surpass the length of a marathon race. A drive on Feb. 8, 2015, put the rover within 220 yards (200 meters) of this marathon accomplishment. An Olympic marathon is 26.219 miles (42.195 kilometers).
http://feeds.sciencedaily.com/~r/sciencedaily/~3/Pfh-i7_DehU/150210135052.htm
