About this episode
This week it’s a look at saliva with America’s funniest science writer, Mary Roach, author of Gulp: Adventures on the Alimentary Trail . The Sterns are at the Blue Scorcher Bakery Café in Astoria, Ore., and we learn which salts are really worth the money with salt merchant Mark Bitterman, author of Salted: A Manifesto on the World's Most Essential Mineral. Broadcast dates for this episode: April 6, 2013 (originally aired) March 28, 2014 (rebroadcast)