What kind of animal was a megalodon? How large would an asteroid have to be to wipe out all human life on the planet? How much do you really know about the science that matters? This book features more than 300 fun science questions and answers to test your knowledge. Find out all about dinosaurs and prehistoric life, blood and guts, brains, senses and feelings, weather and climate change, natural disasters, trains, planes and transportation, and lots more! There are instructions at the back of the book that allow you to "play" the book too, on your own or in a group.