Anthropologist Susan Greenhalgh describes how soda companies have influenced the science around sugary drinks. Health and nutrition reporter Alice Callahan breaks down "ultra-processed foods," a newish term to describe the evil that lurks on supermarket shelves. National Park guide Joseph C. Ward explains how a Cheetos bag altered the ecosystem in a New Mexico cavern. Physician and journalist Bryce Y. Lee reveals how scientists are using the food dye found in Doritos to make see-through mice. Breadmaster Jim Lahey reminisces on the 15th anniversary of his revolutionary no-knead bread-making book. Chef Aric Attebery shares tips for incorporating seasonal farmers market ingredients into the bowls we make at home.