When you’re dieting to lose weight, human evolution is often working against you. We’ll talk about why with Daniel Lieberman, author of Fed Up and founder of Harvard’s Department of Evolutionary Biology.  He spoke with Terry Gross about diets he’s tested, and the often contradictory information about what’s healthy to eat and what’s not. Also, book critic Maureen Corrigan reviews Etna, a novel that looks at war through the narration of a dog.  Subscribe to our free weekly newsletter [https://support.whyy.org/page/39306/subscribe/1]  Follow us on Instagram [https://www.instagram.com/nprfreshair/]  Subscribe to our YouTube channel [https://www.youtube.com/@thisisfreshair]  Check out the Fresh Air Archives [https://freshairarchive.org/] See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]