"There is a mysterious ritual that dates back thousands of years. No living creature has survived it except the penguin. They have wings but cannot fly. They're birds that think they're fish. And every year, they embark on a nearly impossible journey to find a mate. For twenty days and twenty nights the emperor penguin will march to a place so extreme it supports no other life. In the harshest place on Earth loves finds a way."
~ Morgan Freeman as the narrator in March of the Penguins (2005)