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TIL the Hawthorne Effect is when an individual modifies their behavior because they are being observed. Somewhat like a placebo effect, the novelty of being a research subject and the increased attention could lead to behavior changes that result in false positive & inaccurate experiment conclusions

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eg0L TIL of Antinatalism. A philosophy that asserts that having children is unethical.
ANO7x TIL there’s a house in NY that is legally haunted “and seller must inform the purchaser of the haunting.”
RrL9 TIL in 2010 a New York Valedictorian gave her graduation speech condemning the American education system for its “brainwashing” and lack of depth.
bYw7 TIL possums do not actually “play” dead. In fact, they pass out from being shocked.
LArd TIL that an estimated 2 million German women were raped during the later part of WWII. The majority of the rapes took place in the Soviet occupation zone. This is considered by some to be the “greatest phenomenon of mass rape in history”.