22) The age of mammals begins

Orangutan, Borneo. Image credit © Tenzin Alex Anderson

Over the course of the next 60 million years Earth greets rodents, whales, monkeys, horses, cats and dogs, antelopes, gibbons, grazing animals, orang-utans, gorillas, elephants, chimpanzees, camels, bears, pigs, baboons and the first humans. The Age of Mammals!