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
Condoms were originally made of animal intestines or linen.
347
In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
151
Cockroaches can live for 9 days after their head has been cut off.
140
"Fish odor syndrome" is a rare genetic disorder that causes people to smell like rotten fish.
5
Your ears secrete more earwax when you are afraid than when you aren't.
229
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6