Product Description : The Coolest Stuff on Earth: A Closer Look at the Weird, Wild, and Wonderful (National Geographic Kids) Uncover the secrets behind our planets most magnificent marvels epic extremes and astonishing animals in this factpacked series sequelDid you know that dogs can shake off a pound of water in less than a second That some sand dunes whistle and sing That the US dollar bill is full of hidden symbols related to the number 13 Our world is filled with strange bizarre and weird happenings But what do they mean WHY are they important And what secrets are behind themThese secrets and MORE are revealed through cool stories actionpacked photos fantastic infographics and exciting QAs with inthefield experts Discover the secrets of sharkskin the mysteries behind incredible island animals the power behind lightning how a rare gemstone changes color and more Kids will be captivated by this fresh way of looking at our amazing planet ( it is an used product)