New evidence linking extreme climate change, oxygen rise, and early animal evolution was provided by an analysis of organic-rich rocks from South China. A dramatic rise in atmospheric oxygen levels has long been speculated as the trigger for early animal evolution. While the direct cause-and-effect relationships between animal and environmental evolution remain topics of intense debate, all this research has been hampered by the lack of direct evidence ...
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Lake forest health and fitness http://healthandfitness1blog.blogspot.com/2012/09/early-animal-evolution-linked-to.html
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