In the late 1800s, Chicago turned heads by reversing the flow of the Chicago River, an impressive engineering feat that would forever change the city and surrounding landscape. In their new book, Lost Panoramas, Richard Cahan and Michael Williams present an amazing collection of images that document Chicago's amazing accomplishment and its toll on the environment. The Lost Panoramas exhibit at the Peggy Notebaert Nature Museum features some of the rare photographs and maps included in the newly published book. This panel discussion will explore the question of reversing the Chicago River again. The panel will be hosted by Geoff Johnson and will feature Jeanne Gang, Chicago architect and MacArthur Genius Grant recipient.