Though the animal kingdom follows the same rules as the human world when it comes to child rearing, there are a few exceptions. The most notable is the emperor penguin. The female lays her egg and then returns to the sea. The father penguin takes over, balancing the egg on his feet, so that it will be warm. For the next two months, he remains mostly immobile, until the chick comes out. At this point the mother returns to feed the chick but, by then, the father penguin will be half-starved.