This week on A Taste of the Past, Linda is joined by salt expert and author of "Salted: A Manifesto on the World's Most Essential Mineral", Mark Bitterman. Tune in to learn more about salt, the mineral that is essential for animal life and elemental in our diets. Hear more about the history of salt from salt mining to iodization and find out how certain salts get such incredible color. This episode was sponsored by Whole Foods Market.