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Long Way Down: Mariana Trench | National Geographic

Key Facts In This Video

  1. Challenger Deep is about 11,000 meters deep. 00:31

  2. Sunlight cannot reach ocean depths of much more than 1,000 meters. 01:06

  3. The snailfish lives at the deepest depths of any fish ever filmed (around 7,600 meters). 01:28