PATRICIA DANIELS has been an author and editor for National Geographic. She has written and edited books on history, science, and geography for both children and adults and was an author for National Geographic's "Body: The Complete Huma"n. Patricia lives in State College, Pennsylvania. CHRISTINA WILSDON grew up on Long Island in New York. She has written numerous kids books about animals and science. Christina lives with her family in the Pacific Northwest, where bald eagles nest in the city and orcas surface just offshore. This is Christina's first book with National Geogrpahic. Visit Christina's website at http: //christinawilsdon.blogspot.com/. "From the Hardcover Library Binding edition."