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YouTubeNational Geographic
Long Way Down: Mariana Trench | National Geographic
Seven miles is a long way down... more than a mile deeper than Mt. Everest is up. To reach the deepest part of the Mariana Trench, James Cameron will descend past some pretty amazing milestones. Here's a glimpse. Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #MarianaTrench #JamesCameron About National Geographic: National ...
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