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
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
A giraffe's kick is so powerful that it can decapitate a lion.
216
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12