In a rebroadcast from March 13, 2011, Keith & Russ continue their conversation with Vance Holliday of the Departments of Anthropology & Geosciences at the University of Arizona. He talks about recent archaeological in Sonora, Mexico, which revealed what he calls a "slice of Pleistocene pie" - a rich deposit of now extinct animals including mammoths and gomphotheres, as well as Clovis points and other early human artifacts. http://www.argonaut.arizona.edu/holliday.htm
Aired Aug. 2, 2015.