Mars once had a 'Dust Bowl'

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Dry ice lake suggests Mars once had a 'Dust Bowl' (Update)

A newly found, buried deposit of frozen carbon dioxide -- dry ice -- near the south pole of Mars contains about 30 times more carbon dioxide than previously estimated to be frozen near the pole. Image credit: NASA/JPL-Caltech/Sapienza University of Rome/Southwest Research Institute

(PhysOrg.com) -- NASA's Mars Reconnaissance Orbiter has discovered the total amount of atmosphere on Mars changes dramatically as the tilt of the planet's axis varies. This process can affect the stability of liquid water, if it exists on the Martian surface, and increase the frequency and severity of Martian dust storms. Read more at www.physorg.com

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