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
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25