You ever think about how wild it is that modern humans have existed for like 300k+ years, and for approximately all of that time precisely zero of them had any idea how chemistry actually worked, but meanwhile your body is made of literally trillions of cells that somehow understand and remember everything you eat, so they're able to translate a weird very specific micronutrient deficiency into a food craving without you consciously being any the wiser?
E.g. a story my mom often tells is that when she was pregnant, she suddenly had a craving for pickled herring, despite ordinarily not liking fish.
On the surface this is just a random anecdote but the implications about how your body works are kinda staggering
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