Drawing from their podcast Wow in the World, Mindy Thomas and Guy Raz take a hilarious, fact-filled journey through a variety of scientific topics. Along the way, they answer the meaningful questions that readers 8 to 12 (and many of us adults) haven't dared to ask, and they include jokes, photos, quizzes, and Wow-To experiments.

Feathers, fins, fur, feet—the animal kingdom is made up of nearly 9 million known species! Whether it's flying fish or flightless birds, each living creature has a unique role to play in the life of planet Earth, and this book is an entertaining introduction to what makes them special.