Chicago's Tropical Reef

On this edition of Chicago Tonight's Field Trip, we hit the road with The Field Museum’s Fossil Invertebrates Collections Manager to hunt for fossils from a time when Chicago was a tropical reef. Watch the video and view a slideshow.

Jahmal Cole was inspired to create a new web series after volunteering at the Cook County Jail and realizing that most of the inmates had never visited landmark sites, such as the Willis Tower.

NPR's Peter Sagal joins us to discuss his new PBS series about the U.S. Constitution.