Explore your incredible machine Your body is full of weird mysteries and amazing wonders, and it is time to discover exactly how it all works! Join bestselling hosts Mindy Thomas and Guy Raz as they take you on a hilarious, fact-filled adventure from your toes to your tongue and your brain to your lungs. Answers to your wildest questions Why do you have a belly button, and what does it actually do? How does your body know when to stop growing? You will uncover the science behind everything you do, including walking, talking, breathing, and even barfing. You will finally understand the gross, cool, and totally amazing things happening inside you right now. Activities and awesome facts This guide is absolutely packed with funny illustrations, incredible photos, side-splitting jokes, and interactive quizzes. You will even find amazing experiments to try at home, giving you everything you need to become an expert on your very own body.