BONUS DISCUSSION:  Dr. Valerie Trouet, professor in the Laboratory Of Tree-Ring Research at the University Of Arizona, is the guest for "ROI" episode 469.  Dr. Trouet joins the panelists to discuss "Tree Story:  The History Of The World Written In Rings."

Rick Sweet is the host for this edition in the "ROI" program series, and Brett Monnard and Ed Broders are history buffs.

This program is recorded at KALA-FM, St. Ambrose University, Davenport, Iowa, USA!