On the cuteness scale, a penguin strolling along in custom-made shoes is tough to beat. But it’s a regular sight at the New England Aquarium in Boston, where Beach Donkey, a 24-year-old African ...

Pierre, a venerable 25 years old, was going bald, which left him with an embarrassingly exposed, pale pink behind. Unlike marine mammals, which have a layer of blubber to keep them warm, penguins rely ...