30 years ago, you could buy a lifetime, unlimited first-class travel pass with American Airlines for $250,000.
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One human hair can support 3 ounces.
191
160 cars can drive side by side on the Monumental Axis in Brazil, the world's widest road.
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The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
If you dropped an aerodynamic object (such as a bullet) from the Empire State Building, you could kill someone.
132
In many countries, urine was used as a detergent for washing.
17
Each year, more than 50,000 people are injured by jewelry in the U.S.
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