Only in a Coke ad do you see a penguin at the North Pole among the polar bears. Penguins aren't associated with Christmas except in my beleaguered brain. They are cute, charming, and fascinating. Let's talk penguin. In addition to being cute, penguins are remarkable birds. They can stay underwater several minutes. Some can dive as deep as 900 feet. They've managed to survive in some of the most inhospitable places on the planet. Even so, some are under threat from global warming, habitat loss, and pollution.