Tickling was a form of torture used in ancient China on nobility because it left no mark and recovery was quick.
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Organized crime is estimated to account for 10% of the United States' national income.
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Al Capone earned $105m per year from alcohol and rackets during the Prohibition era. Today, this would be equivalent to $1.4b per year.
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Colorado switched mile marker "420" to "419.99" to stop people from stealing it.
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