Condoms were originally made of animal intestines or linen.
347
Squirrels forget where they hide about half of their nuts.
698
Parrot parents "name" their children with a signature call.
112
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The oldest recorded elephant lived for 82 years.
213
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
When you shave a guinea pig it looks like a little hippo.
19