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Fraser
2009-Jun-29, 04:10 PM
Remember the polygon-shaped landforms at Mars north polar region that the Phoenix lander studied? The polygons are produced by seasonal expansion and contraction of ground ice, and these shapes have been found in other regions on Mars as well. New studies of images from the HiRISE camera on the Mars Reconnaissance Orbiter indicates [...]

More... (http://www.universetoday.com/2009/06/29/landforms-indicate-recent-warm-weather-on-mars/)

trinitree88
2009-Jun-29, 04:50 PM
Remember the polygon-shaped landforms at Mars north polar region that the Phoenix lander studied? The polygons are produced by seasonal expansion and contraction of ground ice, and these shapes have been found in other regions on Mars as well. New studies of images from the HiRISE camera on the Mars Reconnaissance Orbiter indicates [...]

More... (http://www.universetoday.com/2009/06/29/landforms-indicate-recent-warm-weather-on-mars/)

Fraser. Reminds me of a Scientific American article on patterned ground. see:http://www3.hi.is/~oi/patterned%20ground%20Thule%201986.jpg

see:http://4.bp.blogspot.com/_anFZmYndarg/SUHWZ5UFc7I/AAAAAAAAADE/8BTqHcNrsiA/s400/Blog2_6.JPG

see:http://lh5.ggpht.com/_buBLrEVcQE4/SdQmu89JcfI/AAAAAAAAFe4/dGEvn7Nq-L8/IMG_2617.JPG