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  2. en.wikipedia.org

    The following table lists the most populous human settlements by estimated population at specified points in history according to three sources: Ian Morris, George Modelski and Tertius Chandler. City names are in bold where all three sources agree. It shows the evolution of the largest settlement from proto-city to city to urban area to metropolitan area.
  3. kudacity.com

    World Cities by Continent We're using the seven-continent model, in which North America and South America are considered separate continents. You may notice, however, that the following page has only six sections: this is because Antarctica has no cities. Yet. Africa Asia Australia & Oceania Europe North America South America Africa The Mother Continent, where few cities had existed below the ...
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