Rising oxygen levels are linked to carnivore evolution

07/31/2013 | LiveScience.com

A new study links rising oxygen levels with the evolution of carnivores, which spurred the Cambrian explosion 540 million years ago. Research at Harvard University combines two competing models about how carnivorous animals came to be. "There's always been this tension. Each side is looking at their own data, which is often common in science," said study lead author Erik Sperling.

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