The study of fossils, the discovery of ancient artifacts, and the use of radiocarbon dating have helped us learn a lot about prehistoric times. How did the dinosaurs live? What did Earth look like long ago? What were the first human beings like? Scientists are now fairly confident in their answers to these questions, and readers see why as they explore all the ways people have used science to solve what were once the mysteries of prehistory. Captivating illustrations, helpful diagrams, and photographs enhance the informative main text and sidebars, giving readers a detailed look at the past.