Home > Work > The Rise and Reign of the Mammals: A New History, from the Shadow of the Dinosaurs to Us
1 " Then, about 34 million years ago, as the Eocene transitioned to the Oligocene, the world turned. The hothouse flipped to a coolhouse, which would eventually become an icehouse. The "
― Steve Brusatte , The Rise and Reign of the Mammals: A New History, from the Shadow of the Dinosaurs to Us