The mile is Latin for 1,000. The number of paces it took the average Roman!
36
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Most of the dust underneath your bed is actually your own dead skin.
251
A fire in Australia has been burning for more than 5,000 years!
91
American car horns beep in the tone of F.
66
The original game of "Monopoly" was circular.
230