This image shows some of the dunefields of Mars.
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This is an example of Martian sand dunes. They are found in the southern hemisphere. They show that wind can change the surface of a planet. Wind is very important to the erosion of the Martian landscape.
Sand dunes were also seen at equatorial latitudes by Mars Pathfinder and also by the Viking I lander in the Chryse Planitia Basin (check the large topographic map of Mars for the distances between these two landing sites).
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During the Mars Pathfinder Rover's exploration of the Martian surface, it went over what scientists now call the "Mermaid Dune". The soil on top of Mermaid Dune seemed to be dark gray. However, when the...more
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Separate from the Martian outflow channels, or the river valleys, are large Martian lakes (600 km, or ~1000 miles across) which once were part of a flood. ...more
This picture shows fog on Mars. More fog has been seen in images returned by Mars Global Surveyor of the south polar region of Mars. Martian fog may have a little bit of acid mixed in with the water drops....more
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