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Drain the Great Lakes

Genre: Science, Nature, Documentary

Computer-generated imagery is used to reveal hidden secrets of North America's Great Lakes, the largest system of free fresh water on earth.
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(First Aired: Dec. 11, 2011)
Computer-generated imagery is used to reveal hidden secrets of North America's Great Lakes, the largest system of free fresh water on earth.
  • Sun 7/2
  • 6:00PM-7:00PM
  • 162
  • NatGeo
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  •  
  • 726
  • NatGeo HD