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Scientists have analyzed significant changes in the carbon cycle over the last 540 million years, including the five mass extinction events. They have identified 'thresholds of catastrophe' in the carbon cycle that, if exceeded, would lead to an unstable ...
2017-09-20 08:56:00
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Sedimentary rocks at Meishan, China. These rocks contain signatures of a disturbance in the carbon cycle immediately preceding Earth's greatest mass extinction. Credit: Shuzhong Shen In the past 540 million years, the Earth has endured five mass extinction ...
2017-09-20 05:37:00
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