Alfred W. Crosby is the author of such influential works as The Columbian Exchange: Biological and Cultural Consequences of 1492 (New York: Greenwood Press, 1973). He lives in retirement on Nantucket Island with his wife Frances Karttunen, noted in her own right for important works in linguistics and history. In September, 2013, I had the opportunity to carry on a long conversation with Crosby about his work, American Studies, and the future for environmental history. Crosby suffers from Parkinson's disease. His mind is sharp and his insights are keen. The Columbian exchange is the phenomenon of the contact period in which European crops and animals were imported into the New World, while New World crops and animals were introduced into Europe.