Penguins’ feathers are coated in a waterproof oil produced by an adaptive gland called the preen gland, according to Corbin Maxey, an animal expert and biologist. Penguin chicks, however, do not have ...

Many people consider penguins to be among their favorite creatures on the planet. There’s something special about seeing a group of flightless tuxedoed birds gathering in groups and waddling from ...