Bezoar
Yesterday I went to Philadelphia's famed Mütter Museum at the College of Physicians. I hadn't been there for about 35 years, so it was nice to reacquaint myself with some favored old exhibits (human beings with long horns growing out of their forehead, fetuses at all stages of formation and deformation, bodies with extra heads and limbs, gigantic tumors and colons, etc.), though a few of the most famous items had disappeared (e.g., shrunken heads, apparently because they had been "unethically procured").
One of the most striking exhibits — for me, since most people probably would not pay much, if any attention to it — was the one about bezoars. They are nondescript objects that look like stony balls. Even in section, they are not very exciting to look at, because they are basically a hard, indigestible mass of material such as hair, plant fibers, or seeds that form in the stomach or intestines of animals, especially ruminants, sometimes also humans.
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