RM
Water around Martian craters
Water on Mars. Computer artwork looking west over water in the Aram Chaos Crater on Mars 3.5 billion years ago. The area is drying out, but is still supplied by water through the Ares Vallis (Ares Valley, from right). Areas across top are flooded by water from the massive Marineris Valles canyons to the west. This image is hundreds of kilometres across. Mars is now a desert world, and the water was ultimately lost due to its thin atmosphere and weak gravity. The topography was drawn with Terragen software, using data from the laser altimeter on the Mars Global Surveyor probe.
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