Bedbugs, once thought all but eradicated, have become resurgent all across America. This summer, we've heard stories about these pests spreading all over the country — from the Empire State Building to rural towns. But why does the problem continue to get worse? Recently, a major pest-control company releaseed a top-10 list of the most infested cities in America. However, even with the number of reported infestations continuing to climb, all hope is not lost.
Radiolab asks what race is, and whether it's fixed or fluid, genes or culture?