This series brings to life an age ruled by reptiles and other prehistoric creatures who swam the seas, soared through the skies, and roamed the landscape of our planet. Each volume is jam-packed with fascinating facts, subjects of speculation, and thoroughly modern theories. The information is presented in a lively, exciting format featuring authoritative text, a useful glossary and comprehensive index, helpful hints for further study and Web browsing, and a dynamic array of vibrant photos and illustrations.Come marvel at the incredible variety of life that colonized the prehistoric seas. Read about the land reptiles that turned to the sea in search of food and then adapted to their aquatic environment. Witness the giant crocodiles and other creatures that patrolled the waters with uncontested authority. Consider the Cretaceous extinction and the rise of the great sea mammals.