Dogs have been man's pet for over 14,000 years.
224
Gorillas can catch human colds and other illnesses.
205
Dogs sometimes fake being sick to get attention.
26
There's a rare breed of pig that looks like a sheep.
14
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17