They waddled into stardom in National Geographic’s <i>March of the Penguins</i> 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!<br><br>National Geographic supports K-12 educators with ELA Common Core Resources.<br>Visit www.natgeoed.org/commoncore for more information.