I think they are more like anthropology graphs (e.g., http://www.flickr.com/photos/runningafterantelope/2366031003/in/set-72157604764590760 http://www.flickr.co

I think they are more like anthropology graphs (e.g., http://www.flickr.com/photos/runningafterantelope/2366031003/in/set-72157604764590760 http://www.flickr.com/photos/runningafterantelope/2366031003...)