Condoms were originally made of animal intestines or linen.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
Within three days of death, the enzymes that once digested your food begin to eat you.
22
In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
151
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