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NOVA - Ghosts of Machu Picchu

Ghosts of Machu Picchu Ghosts of Machu Picchu
Why did the Incas abandon their city in the clouds?
http://video.pbs.org/widget/partnerplayer/1392958573/?player=WGBY-PBS&w=512&h=288&chapterbar=true&autoplay=false Why did the Incas abandon their city in the clouds? /episodes/get/2353 /episode/2353 NOVA: Ghosts of Machu Picchu /episode-player/2353
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