In Mohave County, Arizona, if someone is caught stealing soap, they must wash themselves with it until it has gone.
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In 1974, prankster Porky Bickar was so into April Fools, he flew hundreds of tires into a dormant volcano in Alaska and set them on fire - fooling the local populace and coast guard into thinking the volcano was active.
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The exact cause of death and burial site of Genghis Khan is unknown, because all of the 2000 funeral guests and 800 soldiers were killed in order to preserve the secret.
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In 2011, there were 3 known cases around the world of twins coming from different fathers.
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