It's impossible to kill yourself by holding your breath.
703
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
244
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
The face of a penny can hold about thirty drops of water.
85
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
'Second Street' is the most common street name in the U.S.; 'First Street' is the sixth! "
41
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22