Book excerpt: A #1 New York Times Bestseller! Based on their #1 kids podcast, Wow in the World, hosts Mindy Thomas and Guy Raz take readers on a hilarious, fact-filled, and highly illustrated journey through the human body—covering everything from our toes to our tongues to our brains and our lungs! WHY in the world do I have a belly button? And WHAT in the world does it do? WHEN in the world will my nose stop growing? And HOW in the world does my pee keep flowing? The human body is a fascinating piece of machinery. It's full of mystery, and wonder, and WOW. And it turns out, every single human on the planet has one! Join Mindy Thomas and Guy Raz, hosts of the mega-popular Wow in the World podcast, as they take you on a fact-filled adventure from your toes and your tongues to your brain and your lungs. Featuring hilarious illustrations and filled with facts, jokes, photos, quizzes, and Wow-To experiments, The How and Wow of the Human Body has everything you need to better understand your own walking, talking, barfing, breathing, pooping body of WOW!