They waddled into stardom in National Geographic´s March of the Penguins film. These guys are now nature´s ROCK STARS! If you´re age 5, you´re probably as tall as an Emperor. But why do they throw up so much? March this way, and find out all!National Geographic supports K-12 educators with ELA Common Core Resources.Visit www.natgeoed.org/commoncore for more information.