There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Penguins have a gland above their eye that turns saltwater into freshwater.
12
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
Early American humans hunted car-size armadillos and used their shells for houses.
12
Sloths take two weeks to digest their food.
243