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TIL that a tank designed by the Swiss military had a bug where turning on the heater could cause the main gun to fire

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xVv65 TIL in China, the one-child policy has wreaked havoc. By encouraging the birth of boys rather than girls, an imbalance of the sexes has emerged. China will now have a surplus of 30 to 40 million men under the age of 19. That’s the equivalent of the entire population of young men in the United States
9Y49M TIL: Figs aren't actually a fruit, but rather an inverted flower that can only be pollinated when a female fig wasp crawls in. The wasp is then consumed by the flower.
M7kW7 TIL about Connie Converse, an American singer-songwriter, active in New York City in the 1950s. Her work is among the earliest known recordings in the singer-songwriter genre of music. In 1974 Converse wrote letters to family, left her home and was never heard from again. Her fate remains unknown.
WkVXL TIL of “the Tree That Owns Itself.” In 1890, a landowner left an oak tree and the surrounding land to the tree itself. When the original tree was knocked down by a storm in 1940, the new tree was planted from an acorn and is now known as “The Son of the Tree That Owns Itself.”
N7wXP TIL whilst boarding a plane, an elderly passenger threw coins into one of the engines to ensure “good luck”. Plane mechanics later found nine coins at the site, including one inside the engine. The flight ended up taking off more than 5 hours late.