character: Alfred Wegener
topic: Theory of Continental Drift
grade: 11
subject: Chemistry
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character: Harry Hess
topic: Seafloor Spreading
grade: 11
subject: Chemistry
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character: James Hutton
topic: Uniformitarianism
grade: 11
subject: Chemistry
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character: Antonio Snider-Pellegrini
topic: Early Concepts of Continental Drift
grade: 11
subject: Chemistry
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