Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Sloths take two weeks to digest their food.
243
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
The elephant brain weighs about 6,000g.
274
There's a rare breed of pig that looks like a sheep.
14