Low level of oxygen in Earth's middle ages delayed evolution for two billion years

ENN
Feb 2, 2017, 10:46 am69 pts
New research by the University of Exeter explains how oxygen was trapped at such low levels. Professor Tim Lenton and Dr Stuart Daines, of the University of Exeter Geography department, created a computer model to explain how oxygen stabilised at low levels and failed to rise any further, despite oxygen…

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