Researchers have suggested that lifestyle choices explain the remarkably high number of very old people living healthy lives in regions of the world known as “blue zones.” That research has spawned cookbooks, docuseries, and diets and turned blue zones into a household name. Today’s episode is a conversation with Dr. Saul Newman, who has upended the field by questioning the underlying data and research methods that hold up the now-controversial theory.  Further reading: “Supercentenarian and remarkable age records exhibit patterns indicative of clerical errors and pension fraud,” by Saul Newman “The Science Behind Blue Zones: Demographers Debunk the Critics”—an open letter signed by scientists and demographers supporting the “blue zones” theory “Sorry, No Secret to Life Is Going to Make You Live to 110,” by Saul Newman for The New York Times Get more from your favorite Atlantic voices when you subscribe. You’ll enjoy unlimited access to Pulitzer-winning journalism, from clear-eyed analysis and insight on breaking news to fascinating explorations of our world. Subscribe today at TheAtlantic.com/podsub. Learn more about your ad choices. Visit megaphone.fm/adchoices