Sheep, goats, octopuses, and toads have rectangular pupils.
7
Cows can sleep standing up, but they can only dream lying down.
745
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
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
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20