Australian archeologists unearthed an ancient city believed to be 1,200 years old in the remote jungles of Cambodia using airborne laser scanning technology. Lidar uses light in a manner similar to the way sonar uses sound. It fires laser pulses rapidly at a landscape and measures the time it takes for each pulse to bounce back. The laser is in a fixed position, firing at a mirror that directs the pulses to the target.

The data collected by the scanner is then used to create a 3D visualization of the landscape. Archeologists mounted the scanners onto a helicopter and mapped 370 square kilometers of remote north-western Cambodia." Which revealed the first clues leading to the discovery of a medieval city believed to be 1,200 years old. The city, called Mahendraparvata, predates the ruins of Angkor Wat, located a mere 25 miles away, according to co-expedition leader Damian Evans.

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