The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
151
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
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
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
Mosquitoes don't just bite you, they also pee on you.
11