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TIL that during the Ming dynasty (approx. 1570), powdered Smallpox scabs were blown up the noses of the healthy. The patients would then develop a mild case of the disease, but were immune to it from then on.

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6E0QY TIL about William Price, a Welsh doctor known for his nationalism, labor advocacy, nudism, and practice of Neo-Druidism. He believed his destiny was to liberate Wales from English rule, thought socks were unhygienic, and named two of his children Iesu Grist, which is Welsh for Jesus Christ.
E11gd TIL an American woman never learned what happened to her husband, whose plane was shot down over Les Ventes, France during WWII. She finally got her congressman to reopen his case in 2011. She was shocked to learn the town had been memorializing him and his sacrifice for 67 years.
9YWEQ TIL that Isaac Newton was elected to parliament to represent Cambridge. It is reported that the only time Newton spoke in parliament was to say, "The window needs closing."
GYbo4 TIL that USB 3 and USB-C devices can create 2.4 Ghz radio interference and cause issues to WiFi and radio wireless devices. Wireless headphones kept disconnecting today and found out that it was the HDD attached right next to the headphone's dongle that was causing this.
4kgZg TIL: Doctors used to blow tobacco smoke up your butt to cure cold, drowsiness, save people from drowning, headaches, etc. An early example was described in 1686 which describes shoving a pipe in and then repeatedly pumping in smoke. Early critics were worried it made the brain "sooty".