rtopitt found this picture first.

seen on

• http://www.oesquema.com.br/trabalhosujo/2009/12/01/para-onde-vai-o-rock.htm
• http://dataviz.tumblr.com/post/265309785
• http://www.rulaf.com/wp-content/uploads/2009/12/rock-map.jpg
• http://img.leprosorium.com/750741
• http://dirty.ru/comments/264740

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