Scientists aren't quite sure exactly when humans evolved, but through fossils and artifacts, we have knowledge about human ancestors from millions of years ago. From bones to tools, the fossils that have been found each tell a small part of the story of our prehistoric past. Full of age-appropriate detail and interesting historical information, this book explains how fossils form and are found in language especially written for young readers. Examples of human fossils and artifacts closely correlate with the narrative, aiding comprehension.