It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
The elephant brain weighs about 6,000g.
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When cats are happy, they may squeeze their eyes shut.
10
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
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17