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
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
There's a rare breed of pig that looks like a sheep.
14