A sixth mass extinction event could reach the tipping point by 2100. Study analyzes changes in carbon cycle leading up to the 5 main extinction events – as well as dozens of smaller ones – and found that the end of this century could mark the tipping point for a 6th mass extinction event.

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A sixth mass extinction event could reach the tipping point by 2100. Study analyzes changes in carbon cycle leading up to the 5 main extinction events – as well as dozens of smaller ones – and found that the end of this century could mark the tipping point for a 6th mass extinction event.