@lumanetatv: There's something in your salt that isn't salt. In 1924, Michigan started putting iodine in table salt to stop goiter, a swelling of the thyroid that was common around the Great Lakes. Within about ten years, goiter there fell by three-quarters or more. Decades later, one study estimated it also raised IQ by about 15 points in the places goiter had hit hardest. Check your salt. If it says iodized, that's 1924, still working. Sources: Markel, Milbank Quarterly (2014); Feyrer, Politi and Weil, Journal of the European Economic Association (2017); 21 CFR 100.155. #history #science #salt #iodine #todayilearned

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Sunday 25 October 2026 20:25:51 GMT