Emperor Penguin

Emperor penguins breed in the heart of the Antarctic winter when temperatures reach -60°C -- cold enough to make human skin freeze and teeth crack. They waddle and toboggan for up to 60km across the frozen sea to reach their breeding colonies, where they huddle tightly together to keep warm. After egg-laying, all the females return to the ocean to feed, leaving each male carefully balancing a single egg on his feet, warming it in a special pouch on his belly.