EVENTS: Thursday, June 13: NASA
Post# of 63836
Posted On: 06/11/2013 5:26:44 PM
EVENTS:
Thursday, June 13: NASA Historian Bill Barry: "The Space Program Under Presidents Nixon and Ford," UStream, Noon EDT
Martian Dune Marks May Be Tracks of Dry-Ice Sleds
NASA research indicates hunks of frozen carbon dioxide -- dry ice -- may glide down some Martian sand dunes on cushions of gas similar to miniature hovercraft, plowing furrows as they go.
Researchers deduced this process could explain one enigmatic class of gullies seen on Martian sand dunes by examining images from NASA's Mars Reconnaissance Orbiter (MRO) and performing experiments on sand dunes in Utah and California.
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