Amazing sand dunes on Mars

It's a Mars-filled weekend here at SRV. Check out this amazing HiRISE image of a sand dune inside a crater on Mars.
This image also appeared in a Discover Magazine online article: http://blogs.discovermagazine.com/badastronomy/2010/05/05/are-martian-gullies-formed-by-water-or-not/

Image Credit: NASA/JPL/University of Arizona. Full Image at: http://hirise.lpl.arizona.edu/PSP_001440_1255