Lidar maps vast network of Cambodia’s hidden cities
Extent of Khmer Empire rising from the jungle is stunning
![Preah Khan in Cambodia](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/06/061516_bb_lidar_feat.jpg?fit=860%2C460&ssl=1)
REDISCOVERED CITIES A collapsed building is located near a central temple in the 12th century city of Preah Khan in Cambodia. Aerial laser surveys of these now-forested parts of northern Cambodia have revealed the extent and layout of ancient, once-interconnected cities of the Khmer Empire.
M. Hendrickson