Study finds lack of oxygen delayed animal life on earth until 800 million years ago

November 3, 2014 5:20 PM

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New study suggests that it took very long for animals to develop life on earth. The atmosphere on earth lacked oxygen, and hence was not conducive to conceiving or growth of animals. It was only until 800 million years ago that animals can be found trace of on the face of the earth. Research led by Noah Planavsky from the Yale University suggests that, oxygen levels were at 0.1 percent as compared to today’s levels then, that means that the Earth’s atmosphere would have been inhospitable to most creatures.

“Although innovation in genetics and ecology is the key driving force behind animal evolution, low oxygen levels can stunt that growth. We looked for evidence by analyzing chromium isotopes from sediments in the U.S., Canada, Australia, and China. Earth’s continental crust contains chromium, and bec...

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