Amazing how they trace outlines of continents. Humans and Water “@calestous: In pictures: Global flight paths http://bbc.in/12K7l6r ”
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@calestous Prof, seems flight paths converge in North America, Europe and china? African airspace is least crowded? http://bbc.in/12K7l6rThanks. Twitter will use this to make your timeline better. UndoUndo
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