character: Alfred Wegener
topic: Pioneering Continental Drift Theory
grade: 10
subject: Geography
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character: Arthur Holmes
topic: Geological Time and Continental Drift
grade: 10
subject: Geography
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character: Harry Hess
topic: Seafloor Spreading and Plate Tectonics
grade: 10
subject: Geography
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character: Marie Tharp
topic: Mapping Ocean Floors and Supporting Continental Drift
grade: 10
subject: Geography
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