Deep, dark unknown -- Freysteinn Sigmundsson. Sylvia Earle -- Gennady Vitorovich Samokhin -- James Cameron -- Freysteinn Sigmundsson.
Summary:
"Did you know the deepest parts of the ocean are still largely unexplored? Courageous explorers risk their lives to go to these great ocean depths. Other explorers journey into deep volcanoes, caves, and mines. Who are they and why are they seeking a glimpse of the world deep below Earth's surface?" --cover.
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