Cambrian Explosion, oxygen (Introduction)
Same theory, slightly new data. Oxygen levels rose and pushed the Cambrian:- http://www.sciencenews.org/view/generic/id/351963/description/Oxygen_boost_aided_carniv...
Same theory, slightly new data. Oxygen levels rose and pushed the Cambrian:- http://www.sciencenews.org/view/generic/id/351963/description/Oxygen_boost_aided_carniv...
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