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TIL When It debuted in 1929, 7-Up soda contained lithium citrate, the compound now used by psychiatrist as mood stabilizer for people with bipolar disorder. It was initially marketed as Bib-Label Lithiated Lemon-Lime soda.

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YprgZ TIL That the US Army tradition of naming helicopters after Native American Tribes (something that was once an official regulation) dates to 1947 and General Hamilton Howze who felt that helicopters were meant to attack the flank and fade away...in the tradition of the Plains Indian tribes.
PYMLe TIL that were was an ice cream brand called Star Spangled Ice Cream, which aimed to be a politically conservative counterpart to Ben & Jerry's (which they considered too liberal). Flavor names included "Smaller Governmint", "Iraqi Road" and "I Hate the French Vanilla".
J1ne8 TIL that there is a World Championship for Microsoft Excel, (an e-sport!) which consists of solving mathematical problems and complex financial models on Excel quicker than your opponents. The 2023 winner, 'Andrew the Annihilator', got a wrestling-style belt, a trophy, and $3,000.
Z8jLB TIL about Molossia, a micronation bordering the U.S. although it's not recognized as a country by any nation, it has its own space program, money, post office and railways. Molossia is in war with east Germany, which doesn't exist since 1989.
0w7kR TIL golf players are allowed to play the ball out of a water hazard without penalty, but it is rarely practical unless the hazard is only a few inches deep.