Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
Condoms were originally made of animal intestines or linen.
347
There's a rare breed of pig that looks like a sheep.
14
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Female kangaroos have three vaginas.
2
Sharks, like other fish, have their reproductive organs in their chests.
248