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
"Fish odor syndrome" is a rare genetic disorder that causes people to smell like rotten fish.
5
Most of the dust underneath your bed is actually your own dead skin.
251
Cockroaches can live for 9 days after their head has been cut off.
140
Mosquitoes don't just bite you, they also pee on you.
11
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
Within three days of death, the enzymes that once digested your food begin to eat you.
22