"With this book about dinosaurs, you'll become an expert and wow your friends and teachers with awesome prehistoric facts: Did you know that dinosaurs had large holes in their skulls to make their heads lighter? Or that the Tyrannosaurus Rex used its bad breath as a weapon? With great illustrations, cool trivia, and fun quizzes to test your knowledge, this junior genius guide will have you on your way to whiz-kid status in no time!"-- Provided by publisher.