Mars Rover Makes Intriguing Discovery As It Nears 'Marathon' Finish Line

© AP Photo/ NASA

NASA’s Opportunity Mars rover found some rather peculiar rocks and minerals as it neared the end of its marathon study of the surface of the planet.

The rocks were found on a hill overlooking a site called “Marathon Valley,” named as such because Opportunity will have traveled 26.2 miles on Mars by the time it gets there.