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TIL the USA spent 2 years building a fort to protect from Canadian invasion, but it was accidentally built in Canada. They abandoned construction and called it Fort Blunder.

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5Yd8D TIL that horseshoe crab blood, costing $60,000 per gallon, is unique and is integral in FDA testing. This has led to a massive effort by scientists to try to conserve this invaluable resource.
E1Lg7 TIL that before 9/11, FAA regulations allowed small knives to be carried aboard aircraft by passengers. So even if screeners had found the hijackers' knives they would have still been allowed to board Flights 11, 77, 175 and 93 with them.
8aGoG TIL that capacitive touchscreens (the kind in smartphones) emit a small ammount of electricity and when you touch it, your finger absorbs some of the electricity. This is how your phone knows the difference between an eraser and your finger.
XEjEX TIL Godman is a colloquial term used in India for a type of charismatic guru that is often raised to a demigod-like figure by their cult following, high-profile presence, ability to attract attention and support from millions, and paranormal powers to heal, to predict, to influence, and read minds.
QJOlL TIL that steve jobs' biological father is Syrian and he was adopted as a kid.