Please Explain: Spices

Most spices are delicious, some have medical value and a good amount of them have changed the course of human history. On this week's Please Explain we'll learn all about spices, from Anise to Vanilla. We'll be joined by Dr. John E. Hayes, Assistant Professor of Food Science at Penn State University and by chef Michael Krondl. Michael is also the author of numerous books, including The Taste of Conquest.