The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
When you shave a guinea pig it looks like a little hippo.
19
Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
156
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
Lobsters have blue blood.
476
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