Photographic illusion shows trees on Mars AdelaideNow

FIRST there were canals. Then an ominous face lept from Mars’ mysterious surface. Now, what looks like rows of alien trees is causing something of a stir.
Taken by NASA and the European Space Agency’s Mars Express Orbiter, the picture is from a collection showing vast sand dunes and icy landscapes on the surface of the red planet.
Australian National University associate professor of astronomy Charley Lineweaver said the sand dunes were extremely steep, and the “tree-like” shapes were simply gullies running down the slopes.