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Carbon Dioxide Helped Ancient Earth Sunday, December 07, 2008 - Ehud Rattner Home >> Headlines >> Environment   
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The planet’s present day greenhouse scourge, carbon dioxide, may have played a vital role in helping ancient Earth to escape from complete glaciation, say scientists in a paper published online today. In their review for Nature Geoscience, UK scientists claim that the Earth never froze over completely during the Cryogenian Period, about 840 to 635 million years ago. This is contrary to the Snowball Earth hypothesis, which envisages a fully frozen Earth. (source: www3.imperial.ac.uk)
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