High definition camera (HiRISE) received the first cartographic images of the Martian surface from a height of 280 km, with a resolution of 25 cm / pixel! Take a look at these pictures.
Layered sediments in the canyon Hebe. (NASA / JPL / University of Arizona)
Bumps in the wall of the crater Gus. (NASA / JPL / University of Arizona)
Russell Crater Dunes. (NASA / JPL / University of Arizona)
Geysers Manhattan. (NASA / JPL / University of Arizona)
The surface of Mars is covered with dry ice. You had ever play with dry ice (of course in leather gloves!)? Then you have probably noticed that the dry ice from a solid directly into a gas passes, unlike ordinary ice, which is heated, turns into water. On Mars ice caps are composed of dry ice (carbon dioxide). When in the spring on the ice fall sunshine, it goes into a gaseous state, which causes erosion surface. Erosion creates whimsical spider form. In this picture shows the channels that have arisen as a result of erosion and light-filled with ice, which comes in contrast to the muted red of the surrounding surface. In summer, the ice dissolves in the atmosphere, and instead will only channels like ghostly spiders carved on the surface. This kind of erosion is typical only for Mars is not possible under natural conditions in the world, because our climate is too warm. Lyricist: Candy Hansen (21 March 2011) (NASA / JPL / University of Arizona)