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

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.

Fuente : http://www.eurekalert.org/pub_releases/2014-02/uos…

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