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In the two million years during which we climbed from stone-tool-wielding Homo erectus with sloping brows to high-foreheaded Homo urbanis - man, the inventor of the city - we underwent 60 glaciations, 60 ice ages.
In the two million years during which we climbed from stone-tool-wielding Homo erectus with sloping brows to high-foreheaded Homo urbanis - man, the inventor of the city - we underwent 60 glaciations, 60 ice ages.