Researchers report that gut microbes track human movements over tens of thousands of years, using genetic comparisons to infer prehistoric migration patterns. The work finds similarities between gut microbiomes from populations separated by large distances, alongside evidence that some microbial species have since disappeared from industrialized settings.
One outlet highlights genetic analysis suggesting that trillions of microorganisms moved with early human groups as they left Africa and spread globally. Another focuses on contrasts between hunter-gather communities in Tanzania and horticulturalist communities in Bolivia, examining what these shared microbes might mean for human health. Nature reports both the “vanishing” of certain gut microbes in industrialized populations and the presence of microbial lineages shared between Indigenous groups in Africa and South America, framing the findings as clues about both ancient dispersals and potential health consequences when modern diets and lifestyles reduce microbial diversity.
