Two parallel tracks left by the wheels of NASA Curiosity Mars rover cross rugged ground in this portion of an observation by the HiRISE camera on NASA Mars Reconnaissance Orbiter on Dec. 11, 2013. The rover itself does not appear in this image.
Two parallel tracks left by the wheels of NASA Curiosity Mars rover cross rugged ground in this portion of an observation by the HiRISE camera on NASA Mars Reconnaissance Orbiter on Dec. 11, 2013. The rover itself does not appear in this image.