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  1. How to Explore the Deepest Layers of the Oceans
    How to Explore the Deepest Layers of the Oceans
    The Amazing Secrets of the Deep Sea
    The Amazing Secrets of the Deep Sea
  1. The Deep Sea | Smithsonian Ocean

    WEBIntroduction. Danielle Hall. Reviewed by Karen Osborn, Smithsonian Institution. Below the ocean’s surface is a mysterious world that accounts for over 95 percent of Earth’s living space—it could hide 20 Washington …