Eagles mate while airborne. See more

Goldfish have the memory span of about 3-5 seconds. See more

The hairs on a polar bear are not white, but clear. They reflect light, so they appear white. See more

The mantis shrimp has an extending claw that can punch a hole through a glass jar. See more

Pigs can't sweat because they don't have sweat glands. See more

Crocodiles swallow stones to help them dive deeper. See more

The Nile catfish swim upside down. See more

Cats have over one hundred vocal sounds, dogs only have about ten. See more

A giraffe can clean its ears with its 21-inch tongue. See more