Globe and Mail: In a study that offers a cautionary message to global policy-makers, a team of researchers from Canada, Australia and the United States has shed new light on a mysterious period of accelerated climate change that occurred 55 million years ago, long before humans appeared.
The team's analysis, published Monday in the journal Nature Geoscience, concerns the Paleocene-Eocene Thermal Maximum (PETM), a relatively brief period in geologic time when Earth's average temperature rose by an estimated five...