Bats sleep 18-20 hours per day.
5
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
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
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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