On April Fool's Day in 1977, the UK newspaper The Guardian ran a 7 page feature on the discovery of the fictitious island nation of "San Seriffe."
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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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Omar bin Laden (Osama's son) was denied citizenship in Britain in 2007 because "Omar failed to provide his father's permanent address".
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There's a flower called "Hooker's Lips" that literally looks like a set of hooker's lips.
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To "testify" was based on men in the Roman court swearing to a statement made by swearing on their testicles.
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In 2012, a squirrel in Fareham, UK got its head trapped in a decorative Halloween skull and scared the crap out of the neighbours.
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Students at the John Hopkins University collaboratively decided to opt out of their final since the professor set his curve based on the highest score grading it as 100%. They chose to receive a score of zero, making it the highest grade and thereby getting 100%.
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