Before long hair became a staple of Disney princesses, from Sleeping Beauty to Belle, Jasmine, Rapunzel, Elsa, and Moana, there was Snow White's jaunty black bob in 1937's Snow White and the Seven ...

Following is a transcript of the video. Narrator: If you peel back the layers of Rapunzel's hair in "Tangled," you'll see just how complicated animating 3D hair can be. But back then, Disney had ...