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The oceans and seas of the world, and the enterprise and ingenuity that has been used to master them. Episode seven: Oceanography and the startling discoveries made under the water, in the deepest of the deep. "You go down to the sea floor and it's a very fractured place, there are big cracks, fissures so deep, the depth gauge can't find the bottom." Cindy Lee Van Dover, professor of oceanography. Presented by Roger Fenby.
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