There is a man who claims to have travelled to an alternate dimension in which The Beatles never broke up and brought back a mix tape of Beatles songs no one in this dimension has ever heard.
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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.
30
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
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