The human microbiome is a pervasive topic as of late. Almost every day a news outlet reports something new about our microbes. As I see it we are mobile homes for all those little cells. You need never worry about being alone–microbial cells are as numerous as our own. To this end, I have started a fun project with my students. It is really simple-Put your hand on a large nutrient agar plate and see what grows. No two hands are alike!