character: Carl Sagan
topic: Cosmology and Black Holes
grade: 10
subject: Physics
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character: Stephen Hawking
topic: Black Hole Theories
grade: 10
subject: Physics
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character: Albert Einstein
topic: General Relativity and Black Holes
grade: 10
subject: Physics
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character: Neil deGrasse Tyson
topic: Fundamentals of Cosmology
grade: 10
subject: Physics
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