from the recommend-doctor-brinkley dept.
sciencehabit writes "Europe's best-known mummy wasn't just a medical mess; he also had terrible teeth, according to a new study. Ötzi, a Stone Age man who died atop a glacier about 5300 years ago, suffered from severe gum disease and cavities. When Ötzi was discovered atop a glacier on the Austro-Italian border, his frozen corpse was intensively studied. But no one took a close look at his teeth until now. Using 3D computer tomography (a CAT scan), the hunter's mouth could be examined for clues as to the life he led. A fall or other accident killed one of his front teeth, still discolored millennia later. And he may have had a small stone, gone unnoticed in his whole-grain bread or gruel, to thank for a broken molar. That gruel may be the culprit behind Ötzi's cavities and gum disease, too. The uptick in starches, the researchers suggest, could explain the increasing frequency of cavities in teeth from the time—a problem that's been with us ever since."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"