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Valley of the Shadow of Death
Harry Ransom Humanities Research Center at the University of Texas at Austin
This photograph has been the subject of analysis by the documentary filmmaker Errol Morris.
Which Came First, the Chicken or the Egg? (Part one) (New York Times, September 25, 2007)
Which Came First, the Chicken or the Egg? (Part two) (New York Times, October 4, 2007)