Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Bats sleep 18-20 hours per day.
5
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
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
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Alligators can live up to 100 years.
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