There are about a hundred trillion microbes living inside your gut — protecting you from infection, aiding digestion and regulating your immune system. As our bodies have adapted to life in modern society, we’ve started… How we study the microbes inside you

Rob Knight is a pioneer in studying human microbes, the community of tiny single-cell organisms living inside our bodies that have a huge — and largely unexplored — role in our health. “The three pounds… How Microbes Shape Our World