The supercontinent of Pangea, mostly assembled by the Triassic, allowed land animals to migrate from the South Pole to the North Pole.

• 二亿三千七百万年前：三叠纪末，泛大陆开始裂解、分离大部分在三叠纪拼合而成的泛大陆，使得陆地动物可以从南极到北极迁徙。