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
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
The oldest recorded elephant lived for 82 years.
213
Sharks have been on the planet longer than trees.
14
Bats sleep 18-20 hours per day.
5