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Theory on origin of animals challenged: Animals needs only extremely little oxygen

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One of science's strongest dogmas is that complex life on Earth could only evolve when oxygen levels in the atmosphere rose to close to modern levels. But now studies of a small sea sponge fished out of a Danish fjord shows that complex life does not need high levels of oxygen in order to live and grow.

 

http://www.sciencecodex.com/theory_on_origin_of_animals_challenged_animals_needs_only_extremely_little_oxygen-128041

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