character: Stephen Hawking
topic: The Nature of Black Holes
grade: 11
subject: Geography
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character: Carl Sagan
topic: Cosmos and Its Mysteries
grade: 11
subject: Geography
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character: Albert Einstein
topic: Theory of Relativity and Black Holes
grade: 11
subject: Geography
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character: Neil deGrasse Tyson
topic: Understanding Dark Matter and Black Holes
grade: 11
subject: Geography
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