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. via Pocket http://www.bbc.co.uk/news/science-environment-24624527#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa