Are you a self-proclaimed germaphobe like President Trump? Well, if you think your home is sparkling clean, try walking around with a microscope. According to Rob Dunn, a professor of Applied Ecology at both North Carolina State University and the Natural History Museum of Denmark, we are surrounded by thousands of tiny species, living on every imaginable surface. And while some bacteria can be harmful, most just humbly co-exist with us... and some are more helpful than we know.

In his book, “Never Home Alone: From Microbes to Milipedes, Camel Crickets, and Honeybees, the Natural History of Where We Live,” Dunn takes a safari through our homes, introducing us to these invisible creatures and explaining how, despite our fervent efforts to sanitize the world, we may be negatively affecting our own health.