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• n  solidified carbon dioxide; dry ice sublimates at -78.5 C and is used mainly as a refrigerant

News & Articles

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• Sliding dry ice may create Mars 'toboggan tracks'
  By Larry O'HanlonDiscovery NewsThere is no mistaking them: the tracks of tobogganers on the frigid slopes of Mars. The Martian toboggans in this case are slabs of dry ice that are now believed to slide down sand dunes and create long, narrow channels that had previously been ascribed to some sort of weird water seeps.The new explanation for the strangely long, high-sided channels in dune faces ...
  June 13, 2013 - NBC NEWS
• Mars: Dry ice 'hovercraft' sled down sand dunes
  KRISTEN BUTLER, UPI.com Dry ice "hovercraft" are responsible for the linear gullies found on Martian sand dunes, according to NASA.
  June 12, 2013 - UPI
• Giant claw marks on Mars dunes? Blocks of dry ice to blame, study says.
  Experiments with dry ice in Utah supported the theory that the narrow gullies spotted on some Martian dunes were caused by the annual spring thaw of chunks of frozen carbon dioxide.
  June 12, 2013 - The Christian Science Monitor