Polar bears have swum and lumbered their ways into kids' hearts. With this book, readers can become polar bear experts and learn how to save the animals they love. Featuring an introduction from Chelsea Clinton!Did you know that a polar bear's fur looks white only because it reflects the light around it, and that its skin is jet-black underneath? How about that a polar bear can swim constantly for days at a time? Or that male polar bears can weigh as much as ten men?Perfect f