(Please note: This interview originally aired earlier this year.) Our guest on this edition of ST is Russell Lawson, a professor of history at Bacone College in Muskogee. Prof. Lawson has written several books on exploration over the years, including "The Land Between the Rivers: Thomas Nuttall's Ascent of the Arkansas, 1819" and "Passaconaway's Realm: Captain John Evans and the Exploration of Mount Washington." Today we're talking about his newest volume, "Frontier Naturalist: Jean Louis Berlandier and the Exploration of Northern Mexico and Texas" (University of New Mexico Press).