Back at the start of the Eocene Epoch, the world was in the clutches of the Paleocene-Eocene Thermal Maximum, and warm, damp forests covered the land from pole to pole.

早在始新世初期，世界就处于古新世-始新世极热期的控制之下，温暖潮湿的森林覆盖了南北两极的土地。