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TIL that negative probability exist and were discovered in 1942. Although highly criticized at first, they are now the bases of quantum mechanics and risk neutral probabilities in finance.

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oBkRK TIL that the version of "A Charlie Brown Christmas" most people have seen is an edited version produced for the 1966 rebroadcast. The 1965 version was considered lost media until 2018, when an original film reel was discovered and its contents were uploaded to the internet
lV01 TIL that in 2002, a woman was denied public assistance because a DNA test showed that her children weren’t hers. An attorney helped her prove that she had absorbed her twin in the womb, thus giving her two sets of DNA, and that her unborn twin was possibly the biological mother of her children.
b9w0N TIL: Americans never 'lost' their British accents. It was the Brits that adopted 'posh' in the early 1800s. American port cities emulated it for a while.
1la4 TIL that the concept of a zombie apocalypse is four thousand years old. In the heroic epic about him, Gilgamesh, the mythical king of Uruk spurned the advances of Ishtar, the goddess of fertility. She became enraged and threatened to “raise the dead who will outnumber the living and devour them.”
egE TIL The Ghostbusters went up against C'thulu and the Necronomicon.