JULIE BEER is a long-standing contributor to National Geographic Kids. Her works include * Penguins vs. Puffins, Piglets vs. Pugs,multiple books in the hit Weird But True! and 5,000 Awesome Facts series, This or That? 4, Get Outside Guide,and Ultimate Explorer Field Guide: Birds,* among others. She...

JULIE BEER is a long-standing contributor to National Geographic Kids. Her works include * Penguins vs. Puffins, Piglets vs. Pugs,multiple books in the hit Weird But True! and 5,000 Awesome Facts series, This or That? 4, Get Outside Guide,and Ultimate Explorer Field Guide: Birds,* among others. She currently lives in northern California with her two daughters, a dog, a cat, and a guinea pig.