Cows can sleep standing up, but they can only dream lying down.
745
Sloths take two weeks to digest their food.
243
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
A group of pugs is called a grumble.
10
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
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
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Tigers can see 6 times better at night than humans.
305