Eric Walker placed Paleocene–Eocene Thermal Maximum (PETM) under Eocene
Eric Walker added Archicebus - Wikipedia to Eocene and Archicebus achilles
Eric Walker added New-found oldest primate ancestor watched the dinosaurs die to a number of topics
Eric Walker added Pythons Slithered Through Europe Before Coiling Around the World - The New York Times to a number of topics
Eric Walker added Evolution of cetaceans - Wikipedia to Eocene and Whales
Eric Walker added Cretaceous–Paleogene boundary and Eocene to Paleogene, and added Paleogene to Cenozoic