We talk to Dr. Maya Shetreat-Klein about her intriguing book, The Dirt Cure. Molly Birnbaum, executive editor of Cook’s Science at America’s Test Kitchen, explains why lamb tastes like lamb, and Bee Wilson has come to believe that changing what we like to eat is the real key to tackling the obesity crisis. Her book is First Bite. Plus Katie Parla, co-author of Tasting Rome, on Rome's changing cuisine and The Sporkful's Dan Pashman on dining out in a wheelchair.

Broadcast dates for this episode:

• March 18, 2016 (originally aired)
• March 17, 2017 (rebroadcast)