RUTH A. MUSGRAVE is an award-winning children's writer, specializing in marine and animal science. As a naturalist and lucky hitchhiker on scientific trips, she's been to the deep sea, the lagoons in Mexico to interact with gray whales, and more. As a freelance writer and the director of WhaleTimes, Inc., Musgrave has been fortunate enough to share her love of animals, the ocean, and ocean exploration. She is the author of EVERYTHING SHARKS (2011) and a frequent contributor to National Geographic Kids Magazine.DANIEL RAVEN-ELLISON is a National Geographic Emerging Explorer and guerilla geographer. He's a lead partner in The Geography Collective, a group of educators and geographers who produce books, websites, and events, to inspire kids about the world around them."