Join us this episode as culinary geographer Lenore Newman takes us on a tour of lost foods—and the lessons they can teach us as we fight to save our current favorite foods from disappearing forever. Newman's project is a new book titled Lost Feast: Culinary Extinction and the Future of Food; Martha was a passenger pigeon and the last living member of her species—an "endling," as such lonely creatures are evocatively called. This episode, Newman takes us on a tour through the foods we have eaten to their end, such as the Pleistocene megafauna, which early humans destroyed as our numbers spread around the world, and the leek-flavored silphium that was so valuable its last stalks were hoarded, alongside gold and jewels, by Roman emperors.