Your ears secrete more earwax when you are afraid than when you aren't.
229
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
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
Most of the dust underneath your bed is actually your own dead skin.
251