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The above map of the world, drawn by Facebook data structuring intern using connections between 10 million Facebook friends ( full-size link ), is interesting enough in itself until you realize that all of the country borders are entirely drawn using Facebook friend connections too. Even if the world was dark and totally unmapped, Facebook could produce a remarkably good approximation of most of its continents’ boundaries, and even the borders of some countries. It still took some clever math. Butler explains how he did it :