Select Field Museum programs are now available for listening or download at chicagopublicradio.org/amplified as a part of Chicago Amplified, a new web exclusive audio library of diverse educational events recorded throughout the Chicago region. Currently Featured Field Museum Program: Aztec Environmental Management with Jeffrey R. Parsons This lecture considers how the Aztecs, and their descendants, managed the piedmonts, lakeshore plains and marshlands to provide for more than a million people in the Valley of Mexico by the early sixteenth century.