Did you know that fish sometimes cough, or that alligator teeth are hollow? It's all weird ... but true The world can be a pretty wacky place Kids will have a blast exploring just HOW wacky in the 5th book in the wildly popular Weird But True series, full of 350 surprising and amazing facts. Topics include science, space, weather, geography, food, pop culture, and just about everything else under the sun, presented with fascinating photos and illustrations. This quirky little reference is so much fun, kids forget they're learning. About the Author: NATIONAL GEOGRAPHIC KIDS inspires young adventurers to explore the world through award-winning magazines, books, website, apps, games, toys, television series and events and is the only kids brand with a world-class scientific organization at its core.