Denmark has twice as many pigs as there are people.
66
Condoms were originally made of animal intestines or linen.
347
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Dogs have been man's pet for over 14,000 years.
224
The cat brain weighs about 30g.
167
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16