Behold the wild world of mammals How does a platypus fight? Where does a marmot spend the winter? When does a camel need water? Unlock the answer to all these secrets and more in this illustrated guide to the world's most interesting mammals. Fuzzy, scaly, clawed, and finned, mammals can be found in the depths of the ocean and the heights of the mountains. Open Earth: Mammals Unlocked introduces young readers to...