This is a great interview. He talks about the human as huge anchor site for massive numbers of microbes. This affects us in a lot of ways in which we don’t think about. One example is the discussion of gut microbes as a factor in obesity. The microbes in the guts of obese mice are more efficient at breaking down food and harvesting energy. Similar bacteria have been found in humans. Mice can lose weight by transferring microbes from thin mice into the fat mice. And how are other food related problems like malnutrition related to gut microbes?