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TIL the Marines use a non-lethal heat beam to ward off people “causing a feeling similar to being on fire”

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nvV9 TIL IBM made the world’s smallest movie by moving around individual atoms, magnified 100 million times
W7xEX TIL that measles can deplete previously acquired immune memory for up to 2 years in adults akin to HIV
kJ684 TIL the Quiznos sandwich chain, once a common sight with its catchy slogan "Mmm... Toasty!" and 4700 locations in 2007, suffered a steep decline and closed over 90% of its stores within the following ten years. This event goes down in industry history as the largest and swiftest collapse.
4PWJ TIL that “to train each Apache pilot from scratch cost £3 million. It took six months just to learn how to fly it, another six to know how to fight in it, and a final six to be passed combat ready. And that was if you were already a fully qualified, combat-trained army helicopter pilot.”
D17kp TIL Walt Disney World near Orlando briefly had a real airport with a singing runway. Grooves in the tarmac were spaced so the lines played the opening notes of "When You Wish Upon a Star" when planes rolled over them. The airport closed in 1972.