Humans are made up of trillions of cells but the majority of those cells are microbes–bacteria, viruses, and other microorganisms. Only about 1 in 10 of the cells in your body are actually human. Now we have a map of the which microbes live where in your body, which will be incredibly helpful in future human health studies. Any disturbance to the force–I mean, to your microbiome assemblage–could potentially result in sickness. So this map is a fantastic first foray into the world of the human microbiome.