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October 23 2013

Meteorite may explain 'how Mars turned to stone'


A meteorite reveals clues to how Mars lost its thick, carbon dioxide-rich atmosphere and became a cold, rocky desert, researchers say.

They say the Lafayette meteorite shows signs of carbonation - where minerals absorb CO2 in a reaction with water.

Mars lost its protective blanket about 4 billion years ago, perhaps because of the loss of its magnetic field, space impacts, or chemical processes.

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