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TIL reCAPTCHA & Duolingo was created by the same person - Luis von Ahn

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W7r6Y TIL that Navajo language was used to carry top-secret messages during the Pacific campaign, WW2. Navajo, a native american language, is incredibly complex and obscure, it was thought to be impossible to decipher by the Japanese Army
6NYX TIL on February 15, 1933, the Mayor of Chicago was shot by an Assassin who was instead aiming at President FDR. The Mayors reportedly said on the way to the hospital, where he later died: “I’m glad it was me and not you, Mr. President”
v1wlx TIL Benjamin Franklin attempted to predict the death of his competitor, Titan Leeds. When Leeds was still alive he posted an obituary anyways. When Leeds challenged it, Franklin insisted he was an imposter. When Leeds died in 1738 Franklin publicly commended the impostors for ending their charade
x4Bb TIL that Google’s first interactive doodle, Pac-man, was so popular that it cost the global economy an estimated 122 million dollars in lost productivity
yA8p TIL the gauge of a shotgun is multiplicative inverse of the weight (in pounds) of the largest lead sphere that would fit in the barrel.