THE UNKNOWN UNIVERSE INSIDE YOUR GUT

THE UNKNOWN UNIVERSE INSIDE YOUR GUT: The human microbiome is essential to our health, but scientists have only begun to understand why. Two researchers set out to map this largely uncharted terrain. By Jeneen Interlandi (Jeneen Interlandi traveled to Paraguay with two scientists who have embarked on a microbiome conservancy project and spoke to more than a dozen other researchers.) In