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TIL that Gadgetbahn is a neologism that refers to a public transport concept that is touted as futuristic or innovative, but in practice is less feasible, reliable, and more expensive than traditional modes such as buses, trams and trains.

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a89EN TIL Mangoes are in the same plant family as poison ivy and mango sap and skin contains urushiol, the same allergen as poison ivy.
e0X4J TIL After Franklin Roosevelt defeated Herbert Hoover in the 1932 US presidential election, he tried to change 'Hoover Dam' back to it's original name: 'Boulder (Canyon) Dam', but by then the name 'Hoover Dam' was too popular with Americans, and 'Boulder Dam' failed to catch on.
6KD8 TIL that when the UK stopped airing TV due to World War 2, the last thing that aired was a Mickey Mouse Cartoon. After the war, the first show that played was the same Mickey Mouse cartoon.
W7k88 TIL: About the naval term - broom at the masthead. It meant that a vessel had made a clean sweep of enemy vessels. Ships literally hung a broom from the mast of a ship. Commonly used in WW2, it dates back to the 17th century.
a8PrL TIL that in 1933, U.S. Roosevelt ordered Americans to sell much of their gold to the government. While exceptions were made for jewelry, art & teeth, possessing more than $100 of gold coins, bars, or bullion was penalized by steep fines or up to 10 years imprisonment. The order lasted until 1974.