Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Cockroaches can live for 9 days after their head has been cut off.
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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
Condoms were originally made of animal intestines or linen.
347
Some Chinese-made hair bands were fashioned from recycled condoms.
131
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
Most of the dust underneath your bed is actually your own dead skin.
251