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        Underground Discovery | Time Scanners: Petra

        See how modern technology reveals an ancient discovery in the city of Petra in this clip from Time Scanners. First, the team uses Ground Penetrating Radar scanners to collect data from the front of the monestary to find evidence of an exterior staircase that once existed. Then, as they analyze the data points from the GPR and piece together a 3D picture they realize there's an ancient structure hidden beneath the monestary.

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