"The giant, flightless Thunderbird was a creature so legendary tales of the animal are still told today. With their size and skills as predators, it's no wonder dinos ruled Earth back in the day. But many of the large animals of the Pleistocene epoch were not dinos. Become a paleontologist as you explore colorful illustrations and fabulous fossil photos to take a trip back in time and discover who was and was not a dino"-- Provided by publisher.