Female kangaroos have three vaginas.
2
The Basenji dog is the only dog that is not able to bark.
4
Rattlesnake mating sessions have been known to last more than 22 hours.
232
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
Penguins have a gland above their eye that turns saltwater into freshwater.
12
A cow produces around 200,000 glasses of milk in her lifetime.
373