It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13