Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
When you shave a guinea pig it looks like a little hippo.
19
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The seahorse is the only fish to have a neck.
12
Alligators can live up to 100 years.
337
Sharks have been on the planet longer than trees.
14