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When the first slimy amphibians crawled onto dry land a few million years ago, they brought with them a powerful craving from that salty, primordial sea. How powerful? It turns out that the genes and ...

Back in 1960, most of the world’s population was deficient in the micronutrient iodine, with severe consequences for public health. By 2020, only 21 countries were iodine-deficient – down from 113 in ...