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TIL that Cher was the first woman to regularly display her belly button on television, becoming the first woman to do so in front of a live studio audience in 1971

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e0E9n TIL that Motorola Razr is still being released after first being released in 2004
yQ1MX TIL that lemons aren't naturally occurring but are a crossbreed between a sour orange and a citron fruit
WkxJo TIL that in 1950, scientist Wernher Von Braun envisioned a Martian colony where the head of state goes by the name, "the Elon" on his book Das Marsprojekt.
XE9pj TIL Johann Trollmann who was a gypsy boxing champion put in a labour camp in Nazi Germany, was forced to fight against a feared ex-criminal and prison guard and won despite being malnourished and exhausted. The still bitter prison guard sought revenge by murdering Johann with a shovel later.
e0KYk TIL of the "poison squad": a group of young government employees in the early 1900s who, in order to test the safety of common food additives of the time, purposely ate ingredients including formaldehyde (embalming fluid) and borax (laundry detergent). Their work led to food labeling requirements.