These days, you can't throw a rock without hitting some start-up trying to boost our microbiomes. For the health-obsessed, microbiome has become the buzzword of the day. That's because it's becoming ever-clearer that all the trillions of microorganisms that inhabit our bodies, and particularly our gut, play an important role in our overall health.
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The Hazda is a small group of hunter-gatherers living in the central Rift Valley of Tanzania, one of the few remaining groups of people left in the world who still collect the majority of their diet through foraged foods. Modernity has still managed to touch their lives, of course, but far less than it has for those of us in the post-industrialised West. For this reason, scientists have long been interested in studying their biology, in hopes of gleaning something about humanity's evolutionary path.