How big were early sharks? How did they eat? What types of prey did they hunt? Young learners will love reading about the amazing, and often fierce, creatures that used to roam the earth, fly through the skies, and swim the oceans. How these animals lived, what they ate, and the theories as to why they died out are all discussed. The animals that roamed the earth millions of years ago looked and acted very different from the animals you find in your backyard today. This series takes readers on a journey back in time to take a close-up look at these prehistoric animals. Engaging text and illustrations discussing how these animals lived and died out, allow readers to feel as though they are walking, flying, and swimming with these amazing and fierce creatures.