Polar bears are the largest land-dwelling predatory animals on earth. Their thick, snow-white fur and thick layer of fat protects them from the cold.

Fun Fact: Male sheep are called rams, while female sheep are called ewes.

The Spinosaurus was one of the most dangerous dinosaurs.

Fun Fact: Storks greet each other by rattling their beaks. It sounds like they’re cold.

Of all animals that ever lived on earth, the Therizinosaurus probably had the longest claws.