Our global warming problem has gotten so bad even Mars is warming up!
OK, just kidding. But it does look as though CO2 subliming from the Martian ice caps in the Martian spring is causing unexpected levels of erosive activity.
"To see new gullies and other changes in Mars' surface features on a time span of a few years presents us with a more active, dynamic planet than many suspected," said Nasa's Michael Meyer, Nasa's Mars Exploration Program chief scientist.
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The solar cycle is a much bigger player - man's role is secondary.
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;)
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