Blue eyes are the most sensitive to light, dark brown the least sensitive.
105
Only humans shed emotional tears.
331
A pipe 2 feet in diameter will allow four times more fluid to pass through it than a pipe 1 foot in diameter.
20
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Most lipstick contains fish scales!
46
It's impossible to kill yourself by holding your breath.
703
97% of all paper money in the US contains traces of cocaine.
93