Lurch, a Watusi bull, had the largest horns in the world.
32
The reindeer is the only mammal that can see UV light.
17
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
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Sharks have been on the planet longer than trees.
14