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
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82