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Thursday, February 11, 2010

Martian Dune Mystery Solved by Bouncing Sand Grains Read More http://www.wired.com/wiredscience/2010/02/martian-dune-mystery-solved-by-bouncing-sand-

By Lisa Grossman, Science News

mars_barchans_cluster

Once Martian sand grains hop, they don’t stop.

sciencenewsThat’s the conclusion of a new study that finds sand can move on Mars without much windy encouragement.

Mars’ sandy surface has clearly been shaped by wind. Its characteristic dunes and ripples are the kind formed by sand particles taking short wind-borne hops, a process called saltation.

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