Lack of oxygen delayed development of complex life on Earth

November 3, 2014 9:13 PM

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Lack of oxygen delayed development of complex life on Earth

"Our research now shows empirical evidence for a surface oxygen level that would have inhibited animal evolution," said Noah Planavsky.

Prior to the proliferation of animal life, during the first billion years in Earth's history, atmospheric oxygen levels were too low to support complex organisms.

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