To this day, dinosaurs remain a never-ending source of fascination to children, who just can't get enough of these compelling creatures. Illustrations, picturing over 60 dinosaur types (including some new discoveries that appear here for the first time in a children's book), maps, and a guide to each individual species--plus an overall introduction to fossils--tell youngsters how and why all the dinosaurs developed as they did. Answer exactly the types of question kids want to know: How big were they? What did they eat? Where did they live? What do their names mean? This lively trip back to the Age of the Dinosaurs, from its beginnings in the Triassic period to the great extinction at the end of the Cretaceous, is guided by one of the major authorities in the field, Dr. Thomas Holtz, vertebrate paleontologist at the University of Maryland, whose specialty is the study of carnivorous dinosaurs.