Lost Mexican City Had as Many Buildings as Manhattan

Lost Mexican City Had as Many Buildings as Manhattan
AP Photo/Ross D. Franklin

Archaeology might evoke thoughts of intrepid explorers and painstaking digging, but in fact researchers say it is a high-tech laser mapping technique that is rewriting the textbooks at an unprecedented rate.

The approach, known as light detection and ranging scanning (lidar) involves directing a rapid succession of laser pulses at the ground from an aircraft.

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