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TIL Max Planck, the father of quantum theory, considered his quantum hypothesis just a mathematical trick to get the right answer rather than a sizable discovery until Einstein interpreted his hypothesis realistically and used it to explain physical phenomena.

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kjom TIL East St. Louis, Illinois is not only one of the most violent cities in the United States, but it consistently ranks among the world’s most dangerous cities. In 2014 the murder rate of the City was higher than that of Honduras, the country with the highest murder rate in the world.
LkMBP TIL that because the Western European medieval monastic day began at 6 am, the word “noon” originally referred to “3 pm” and is derived from the Latin “nona hora” (“ninth hour”). During the 12th-14th centuries, its meaning in English shifted to “midday” and the time gradually moved back to 12 pm.
DQmNr TIL that in 1873, Adolph Coors founded a company in Golden, Colorado, that produces beer and ceramics. The ceramics-branch of what is now Keystone LLC is known as CoorsTek, supplying high-end porcelains for technical applications in many industries worldwide.
4X5Kg TIL Valérie André was the first woman to fly a helicopter in a combat zone, piloting 129 helicopter missions between 1952 and 1953. André rescued 165 soldiers and twice parachuted into combat to treat wounded soldiers. André became the first French woman to achieve the rank of General Officer.
LkeG9 TIL of Evelyn McHale. The Most Beautiful Suicide (link in comment)