Uncover the answers to your biggest questions about the world with this incredible first reference guide. You can explore everything from the massive dinosaurs of the prehistoric age to the powerful rockets traveling through outer space. Learn exactly how the human body works, discover the daily lives of people in Ancient Egypt, and find out what makes heavy machinery run. Every single page is packed with fantastic photographs and bite sized facts that make learning completely engaging and fun. You can test your new knowledge with exciting quiz questions while exploring the different countries of the world and the tiny bacteria that surround us. Perfect for helping with homework or just satisfying your natural curiosity, this comprehensive guide will help you easily discover all the amazing things about the planet we live on.