This document summarizes key facts about some Antarctic animals. It notes that Antarctica is very cold and dry, with seven of the seventeen penguin species living there. Penguins are well-adapted to the harsh conditions with waterproof feathers and an insulating blubber layer. Seals helped discover Antarctica as seal hunters followed them, nearly driving some species extinct until international laws protected them. Whales are the largest mammals but were heavily hunted, though some countries still hunt roughly 400 whales per year.