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Monday, November 23, 2009

Photo: River-Size "Flash Floods" May Have Carved Mars Craters


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An image shows terraced steps in a mock crater, part of a classroom-size experiment at Utrecht University in the Netherlands.

Scientists say that brief but massive flows of water can create such tiered formations, which may help explain some of Mars's strangest craters.

Photograph by Erin Kraal/courtesy Nature