character: Stephen Hawking
topic: Modern Cosmological Theories
grade: 12
subject: Geography
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character: Albert Einstein
topic: Theory of General Relativity
grade: 12
subject: Geography
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character: Carl Sagan
topic: The Universe and Its Mysteries
grade: 12
subject: Geography
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character: Isaac Newton
topic: Laws of Motion and Universal Gravitation
grade: 12
subject: Geography
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