Bob Cullen, "Testimony from the Iceman: The 5,000-Plus-Year-Old Neolithic Man Discovered A Decade Ago is Telling Scientists How He Lived -- and Died," Smithsonian (February 2003).

Heather Pringle, "The Slow Birth Of Agriculture," Science, 282 (November 20, 1998).

William F. Allman, "The Dawn Of Creativity," U.S. News And World Report, 120 (May 20, 1996).