... Credit Copyright: Malin Space Science Systems , MOC , MGS , JPL , NASA Explanation: Is it an Escher, or Mars? Three different types of surfaces visible in the North Polar Cap of Mars morph into each other in a way perhaps reminiscent of the works of M. C. Escher . On the far left dark sand covers the ground , while the center shows a transition to a dune field . On the far right a transition is made to a much lighter surface , likely containing a larger amount of ice. ...