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[science] dry ice surfing

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a176 Canada6688 Posts June 18 2013 00:37 GMT #1 So there are these gullies on mars. Obviously they are not formed by liquid water. And the structures probably aren't created by wind. Hypothesis: they are formed by 'dry ice' blocks tumbling down the side of sand dunes. Dry ice is pretty common on mars. But how do you prove it? Send NASA scientists out to the desert for some fun experiments! (note that the dry ice "blocks" on mars are probably more boulder sized)

Emzeeshady Canada4203 Posts June 18 2013 02:01 GMT #2 --- Nuked ---

garbanzo United States4046 Posts June 18 2013 02:19 GMT #3 That's pretty cool. I'm not really sure why they wouldn't expect the dry ice to keep going the way it did; it seems like the explanation at the end is a very intuitive scenario given the temperature difference in the ice and the sand.

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