Are our bodies adapted to be a hunter-gatherer on the Serengeti? The answer is complicated. Harvard biologist Daniel E. Lieberman says we're actually still evolving, and that cultural factors are as important in shaping humans as biological ones.
An edited version of this conversation was included in a best-of episode of the Brian Lehrer Show on December 26, 2013. It originally aired live on October 15, and the audio from that segment is posted here.
Professor of human evolutionary biology at Harvard and author of the new book, The Story of the Human Body: Evolution, Health, and Disease (Pantheon, 2013), Daniel Lieberman, discusses why we have flat feet, myopia, type 2 diabetes and other evolutionary mismatches and why he thinks we need to think more about our evolutionary history when we think about our health.