Condoms were originally made of animal intestines or linen.
347
Mosquitoes don't just bite you, they also pee on you.
11
The octopus does not have a blind spot.
273
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Penguins have a gland above their eye that turns saltwater into freshwater.
12