The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
There's a rare breed of pig that looks like a sheep.
14
Female kangaroos have three vaginas.
2
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16