character: Dr. Sylvia Earle
topic: Physical Oceanography and Its Impacts on Marine Life
subject: Geography
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character: Jacques Cousteau
topic: Marine Conservation and Oceanography
subject: Geography
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character: Dr. Jane Lubchenco
topic: Ocean Science and Ecosystem Health
subject: Geography
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character: Dr. Robert Ballard
topic: Deep-Sea Exploration and Its Effects on Marine Biodiversity
subject: Geography
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