Frank Maixner, a microbiologist at the Institute for Mummies and the Iceman in Italy, explains the significance of the gut microbes of the Ötzi the Iceman, a 5,300-year-old mummy found frozen in a European glacier in 1991. When they tested the contents of his stomach, scientists found Helicobacter pylori, an age-old bacterium that evolved differently according geographic region.
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