Beautiful pictures of Mars from Nasa 11

Sand dunes are among the most widespread wind-driven features present on Mars. When the Spirit and Opportunity rovers went dormant for the Martian winter, they relied on the spring winds to blow the settled dust off of their solar panels.

Read more: http://science.time.com/2012/08/06/martian-vistas-a-look-at-curiosity-rovers-new-home/#ixzz2HGwSq2if