When cats are happy, they may squeeze their eyes shut.
10
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
The octopus does not have a blind spot.
273
Lobsters have blue blood.
476
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Gorillas can catch human colds and other illnesses.
205