Gravity is an invisible yet powerful force that pulls people, animals, and objects down to the ground so that they don't float into the air. As powerful as gravity is, however, there are certain animals that are able to break free of its forceful pull. Some do so by flapping their wings to fly incredibly high. Others shoot out from under the water. Still others stick to ceilings without any glue. In this book, young readers will discover eight of these extraordinary animals--and the secrets behind their gravity-defying powers. Eye-popping photos and clear, simple text bring these one-of-a-kind creatures to vivid life.