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Marine scientists have mapped the ocean floor and discovered that the "spine" of the earth runs down the Atlantic Ocean, then up through the Indian and Pacific Oceans. It is here that the earth's crust was forged, and it is also where living thing...
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Contents
Pangaea and Continental Drift (4:49) -- The Mid-Oceanic Ridge (6:38) -- Studying the Ocean Floor (3:24) -- The Magnetic Ocean Floor (5:41) -- The Theory of Seafloor Spreading (3:18) -- Proving the Theory of Seafloor Spreading (6:45) -- "Alvin" Div...
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