Great plenary lecture by deep-time paleoclimatologist Isabel Montañez at #GeoBerlin2023 just now.

„The PETM didn’t trash the entire planet, but climate changed at a much slower rate than today.“

The PETM was a warm period 55 million years ago.

https://en.m.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Thermal_Maximum