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TIL of Betty Pack, she was described as “the greatest unsung heroine of the war” and perfected the “honey pot” technique to get information during WW2.

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jZYM TIL that there is a malicious zip file on the internet that is only 42 kilobytes when compressed, but 4.5 petabytes when unzipped (that’s 4500 terabytes or 4,500,000 gigabytes!)
rRGeW TIL Genghis Khan exempted the poor, teachers, artists, and lawyers from taxes, encouraged literacy, and established freedom of religion across his empire. He also forbade the selling of women and the hunting of animals during their breeding season.
VMlv8 TIL The rotating door was created by a man in the later part of the 1800s so he wouldn't have to hold the door open for the women or get stuck holding it for everyone. An added bonus was that it reduced heating and cooling costs by 30%, making it much more energy efficient.
xnB0 TIL a German woman named Thea Alba became famous in the 1920s because she’s could write 10 different things with all 10 fingers at the same time. She could also write using both hands, both feet, and her mouth simultaneously spelling in different languages.
Meoem TIL the Trevi Fountain in Rome, Italy collects about $4000 worth of coins every day. Most of the money goes towards charities like a supermarket for the needy.