Earth in the Jurassic period was much warmer with seas that teemed with life. Dinosaurs began to rule the land as the first sharks and crocodiles appeared in the water. Explore how life grew, adapted, and changed through the Jurassic Period. Engaging images and informative graphics help explain the development of life on Earth, while an encyclopedic-entry-style format makes the text approachable and highly browsable. Final comprehension questions encourage reflection on what readers have learned.