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TIL that Julia Child started off working for the OSS (proto-CIA), where she helped develop a shark repellent

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wLpLJ TIL On July 21, 1861, the first major battle of the American Civil War, known in the North as the First Battle of Bull Run and in the South as the Battle of First Manassas, also earned the nickname the “Picnic Battle” because spectators showed up with sandwiches and opera glasses to watch the battle
06yM TIL: DJ Grand Wizzard Theodore invented record scratching when his mother came into the room to complain about the noise. He put his hand on the record to stop it from spinning and was intrigued by the sound
9Y0BQ TIL The Halifax Explosion was the biggest man made non weapons test explosion that resulted in casualties, with force equivalent to 2.9 kilotons of TNT the explosion caused 60 foot tsunami's and a shock wave that traveled at 7889 meter/s (23X speed of sound) and temperatures of 9,000°F at the center
PYwNE TIL No road or safe route exists between the jungles of North and South America in what is known as the Darién Gap
XEZJ6 TIL that just as % means occurrences per 100, ‰ (a permille) expresses occurrences per 1000.