Today's oceans are home to a wide variety of life, but what kind of mysterious aquatic creatures lurked in the water millions of years ago? Crinoids and Blastoids teaches kids about the plantlike animals that inhabited ancient seas and were the early relatives of sea urchins and sea stars. The Exploring Dinosaurs and Prehistoric Creatures series is the first stepping-stone in developing a child's knowledge of prehistoric natural history. By learning about the incredible creatures of the past, readers begin to understand modern-day animals as well as the delicate balance of the world's environments. From the habitats of prehistory to the fossil hunters of the early twentieth century and the revolutionary discoveries of today, these books present a wealth of information about dinosaurs and other prehistoric creatures, how they were discovered, and the mysteries of their ancient worlds.
