Aug. 26, 2015 Noah Fierer The dust collecting in your average American household harbors a menagerie of bacteria and fungi, and as researchers from CU-Â鶹ӰԺ and North Carolina State University have discovered, it may be able to predict not only the geographic region of a given home, but how many men and women live there and the presence of a pet as well, says CU-Â鶹ӰԺ researcher Noah Fierer (Fear).