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

**Julie Beer *is a long-standing contributor to National Geographic Kids. Her works include Kids vs. Plastic , Penguins vs. Puffins, Piglets vs. Pugs, multiple books in the hit Weird But True! and 5,000 Awesome Facts series, Get Outside Guide, and Ultimate Explorer Field Guide: Birds, among others. She currently lives in northern California with her two daughters. Stephanie Warren Drimmerwrites about science and nature for kids. Her books have explored everything from baby animals to the human brain to outer space. Some of her favorite titles for National Geographic Kids are Beneath the Waves *, about the fantastic diversity of ocean life, and Surprising Stories of Everyday Stuff, about the weird histories of objects from ketchup to frisbees. Stephanie lives in Los Angeles, California.