The Animal MindWe are only beginning to understand the ways in which the animal mind is as complex as our own. A prairie dog's vocal language is now the most sophisticated ever decoded, but their unique jump yip poses as many questions as answers. Gorillas use sign language to describe past events to researchers, so does this mean they ruminate and relive their lives? When an ant looks in a mirror to see a dab of blue paint on its head, they try to clean it off,