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.
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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
There are approximately three chickens for every human on Earth.
13
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12