Mars resembles tree-covered hill in striking celestial photo

This is a photo taken by the Mars Reconnaissance Orbiter (MRO) near the northern pole of Mars in April 2008. It appears to be a hill with trees, but in reality, there are no trees. The carbon dioxide ice (frost) that covered the surface of the sand dunes melted due to the spring sunlight, revealing the darker sand that was originally inside the dunes, creating dark stripes.