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TIL after he ‘killed’ Sherlock in The Final Problem (1893), readers got upset and relentlessly pressured Conan Doyle to resurrect the character. In 1901 Doyle released The Hound of the Baskervilles in a bid to pacify, and finally in 1903 he resurrected Holmes in the The Adventure of the Empty House.

16Q9V TIL that Vilfredo Pareto, an Italian engineer and economist who is considered one of the pioneers of game theory, experienced a notable personal setback when his wife left him for a servant, an event that reportedly had a significant impact on his life and work
YpW4Z TIL the Marshallese used map charts made of sticks to navigate the Marshall Islands in canoe. They displayed the major ocean swell patterns and how the islands disrupted them. The charts are only interpretable by their makers who would memorize them before their voyages. They were used up until WW2.
p8NXb TIL The first purpose-built (and large-scale produced) drone was the product of Reginald Denny. He served with the British Royal Flying Corps during World War I, and after the war, in 1919, emigrated to the United States to seek his fortunes in Hollywood as an actor.
O0pe TIL: Steve Wozniak was the first owner of the phone number 888-888-8888. But it proved unusable, receiving over 100 wrong numbers a day – mostly from babies playing with the phone.
0dMvN TIL Super Mario is named after real-life businessman Mario Segale, who was renting out a warehouse to Nintendo. After Nintendo fell far behind on rent, Segale did not evict them but gave them a second chance to come up with the money. Nintendo succeeded and named their main character after him.