This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
This is another photo from orbit of the polar Martian dunes taken in April near the North Pole of Mars. The white areas are interpreted to be melting CO snow. According to the NASA photo interpreters the dark streaks are damp sand waterwet so question the CO ice ID. Probably mix and the ampquottreesampquot are optical illusions.