There are more telephones than people in Washington, D.C.
121
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
The search engine Google got its name from the word 'googol', which refers to the number one with a hundred zeros after it.
56
Babies are born without knee caps.
78
Since 1982, a radio frequency emanating from Russia has been broadcasting a buzzer-like sound and, periodically, an unknown voice reads orders, names, and numbers. No one knows where exactly it is coming from or what it means.
13
It's impossible to sink in the Dead Sea without equipment!
72