New technology reveals hidden cities in the Angkor region – video

Archaeologists in Cambodia have discovered numerous medieval cities in the Angkor region of Cambodia. Using the latest LiDAR technology, which allows archaeologist to map the topography of an area, underneath forest floors, teams found cities ranging from 900 to 1,400 years old. Some of the settlements found rival the size of Cambodia's capital Phnom Penh. The findings are expected to challenge theories on the development o the Khmer Empire in the 15th century