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Mapping the Unknown, Part 1: Kenny Broad and Blue Holes

  • Season 4
  • , Episode 5  | 
  • Aired: 10/10/2012
    • Length: 14:31
    • Plays: ???
Synopsis >

National Geographic's 2011 Explorer of the Year dives into a perilous submerged cave system known as the Blue Holes of the Bahamas in search of clues to evolution and climate change.

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