Lidar Reveals a New City Hidden in the Cambodian Jungle

A wide-ranging aerial study of archeological sites in Cambodia reveals a Khmer empire that was larger and more sophisticated than previously thought.

By attaching a Lidar scanning system to helicopter skids, Damian Evans, the leader of the Cambodian Archaeological Lidar Initiative (CALI), peered beneath 734 square miles of dense rainforest canopy to map the topography of the ground beneath. He found dozens of new sites that were previously invisible to archaeologists, and significant evid

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