This week we're looking at two types of insects that have made their homes among us in our cities, and are almost always found in large groups and colonies. We'll speak with Dr. Corrie Moreau, an Associate Professor/Curate at the Field Museum of Natural History in Chicago, about the colony behaviors of ants. And we'll talk with Richard Schweid, a journalist and documentary reporter, about his book The Cockroach Papers: A Compendium of History and Lore".