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Guided by a 17th-century Jesuit's tip, researchers uncover an Inca tunnel network beneath CuscoInitially, they conducted sound tests by striking a metal ... Inca engineering and urban planning. The existence of these underground passages has been a topic of speculation for centuries. In his ...
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Archaeologists Use Radar Mapping and Sound Tests to Locate an Ancient Inca Underground Tunnel in PeruTheir work promises to shed new light on the sophisticated urban planning and architectural achievements of the Inca ...
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