Ann Finkbeiner, freelance science writer, joins the "ROI" crew to discuss, "What We've Completely 100 Percent Changed Our Minds About."

The host for the 538th edition in this series is John Kealey, and the history buffs are Brett Monnard and Ed Broders.

Opinions expressed in this program are those of the hosts and the guest(s), and not necessarily those of KALA-FM or St. Ambrose University.  This program is recorded at KALA-FM, St. Ambrose University, Davenport, Iowa, USA!