Animals evolution delayed on Earth due to want of oxygen

November 4, 2014 6:36 AM

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Though we have been living on earth for ages and many studies have been done. Researchers continue their study to know more about our planet. And it is this curiosity that convinced some researchers to delve into earth’s past to solve the long-standing scientific mystery of the delay and formation of life.

If we believe into the findings then it is understood that the first sign of simple life formed for complex animal life to spring up took place after billion years after earth came into existence.

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