The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
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
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
The head of a jellyfish is called the "Bell."
6
Bats sleep 18-20 hours per day.
5
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14