Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Female kangaroos have three vaginas.
2