Screenshot from the film "Office Space." What microbes are lurking in your office and home?
Even when you think you are home alone, you're not. Your house is teeming with tiny roommates in the form of microbes.
Almost all of them are harmless, and now scientists are trying to determine which microbes like to hang out in the living room, and which prefer, say, the water heater. Science writer Veronique Greenwood joins the show with more.