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TIL scientists at Australia’s most famous radio telescope were baffled by signal bursts coming from the direction of distant galaxies for 17 years before they were eventually traced back to someone at the facility opening the door of a microwave oven while it was still running, causing interference

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kOxpg TIL-An undergraduate architecture student in '78 found a flaw in the Design of Citicorp Center '77: that Citicorp Center could blow over in the wind. Repair work was done throughout the night and quit at daybreak, just as the building occupants returned to work. The story remained a secret until '95
1adj8 TIL that La Malinche was a native woman who played a key role in the Spanish conquest of the Aztec Empire, acting as an interpreter, advisor, and intermediary for the Spanish conquistador Hernán Cortés. Today the term "malinchista" refers to a disloyal compatriot in Mexico.
w6PJ TIL that nearly 30% of all American workers need a license to perform their job– including florists, make up artists, ballroom dance instructors, hair braiders and in 21 states, even travel guides.
nW4Do TIL about “compersion”, which is the emotion associated with seeing your romantic partner have sexual relation with another, and is practically the opposite of jealousy.
16nGr TIL that the author of the thriller The Four Just Men offered a £500 prize to whoever guessed the killer's name, but forgot to state there would only be one winner. The book became a bestseller but bankrupted him, as he was legally bound to pay every reader who answered correctly.