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Condoms were originally made of animal intestines or linen.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
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.
140
In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
151
Within three days of death, the enzymes that once digested your food begin to eat you.
22
Most of the dust underneath your bed is actually your own dead skin.
251
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7