Dogs have been man's pet for over 14,000 years.
224
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Gorillas can catch human colds and other illnesses.
205
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18
When dragonflies mate, their tails form a love heart.
22