Fossil shells reveal details of historic climate warming •

A climate warming event 56 million years ago resulted from the release of greenhouse gases, most likely from a volcanic eruption. The warming event, the Paleocene-Eocene Thermal Maximum (PETM), also triggered ocean acidification. A new study shows that just before the PETM there was a short, causal burst in atmospheric CO2, with carbon levels similar to ours today. 

“The PETM is an…

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