It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
A group of unicorns is called a blessing.
304
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