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
The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
17
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Early American humans hunted car-size armadillos and used their shells for houses.
12
Sharks, like other fish, have their reproductive organs in their chests.
248
Female kangaroos have three vaginas.
2