"On the first one, we sent a whole crew down to Antarctica. Our key designers and technical crew went down. One of the producers, Bill Miller, my brother, he went down. Then, we have a penguin expert called Dr. Penguin, one of the world’s leading authorities on the penguin. Well, he’s now on his 20th year down there. He goes down there every year. So, but all of our rigging, the people who rigged for the animation, they know the anatomy of a krill or an elephant seal or a penguin just really well. Because it’s based on nature, it kind of picks up on nature. We have to exaggerate our main characters because otherwise every character would look the same. It’s almost impossible to tell the movie like that. But by and large, everything is very close to their anatomy, not only that, the behavior of snow and wind and even the clouds in the sky is something that we follow very closely."