What did dinosaurs look like? Were they warm-blooded or cold-blooded? Is it possible to bring dinosaurs back? How is a fossil restored? With Revealing the Secrets of Dinosaurs, kids can explore questions and mysteries about these fascinating creatures that roamed the world millions of years ago.Explore fascinating mysteries and secrets of history and folklore from countries and cultures around the world. Designed for students was a 6th to 8th grade primary reading level, World Book's Enigmas of History 2 presents the most recent findings and theories of scientists, archaeologists, historians, and folklorists concerning questions that have puzzled experts for hundreds, sometimes thousands, of years. In each nonfiction book in the series, kids will find maps, diagrams, timelines, and glossaries to aid their in-depth understanding of the topic.