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Low oxygen 'delayed life on Earth'
Animals took so long to evolve and thrive on Earth because of incredibly low levels of oxygen during a period more than a billion years ago, scientists say.
Animals took so long to evolve and thrive on Earth because of incredibly low levels of oxygen during a period more than a billion years ago, scientists say.
Source: BBC News
Posted on: Friday, Oct 31, 2014, 8:41am
Views: 1232
Posted on: Friday, Oct 31, 2014, 8:41am
Views: 1232
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