Data visualization guru Ben Fry has created a unique map of the United States by displaying all of the nation's 26 million roads-and nothing else. As he says:"No other features (such as outlines or geographic features) have been added to this image, however they emerge as roads avoid mountains, and sparse areas convey low population."The resulting image of a transportation network sans substrate is very reminiscent of the plastinated human circulatory system pieces from Body Worlds. One was designed by governments. The other by natural selection. Discuss.Thanks, Justin.