Carbon13

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Yes, that is a fossilThe Apex Chert is a 3.465 billion year old sedimentary unit in Western Australi

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The story of carbon isotopesIn this recent post (http://on.fb.me/1CfT7B8) we told some of the story

Link #science #chemistry #isotope #carbon #carbon12 #carbon13 #climate change #extinction #carbon cycle #organic #the earth story