Charles C. Mann, "Gobekli Tepe: The Birth Of Religion," National Geographic (June 2011).

  Andrew Curry, "Gobekli Tepe: The World's First Temple?," Smithsonian (November 2008).

  Guy Gugliotta, "The Great Human Migration," Smithsonian (July 2008).

James Shreeve, "Human Journey," National Geographic (March 2006).

  Mike Balter, "The Seeds Of Civilization," Smithsonian (May 2005).

Bob Cullen, "Testimony From The Iceman," Smithsonian (February 2003).

Michael D. Lemonick et al., "The World In 3300 BCE," Time (October 26, 1992).