Ep 13. Penguin: Sub-Zero Survivor

Life in the Antarctic is never going to be easy, but down here in the sub-zero temperatures, a whole variety of animals have carved out their own niche. On many island shores, different species of penguins gather in ungainly groups to rest, breed and raise chicks, while in the water they glide gracefully, dodging huge ice floes as chunks break free of glaciers and ice shelves.