character: Carl Sagan
topic: Cosmic Expansion and the Universe
grade: 9
subject: Science
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character: Isaac Newton
topic: Laws of Motion and Universal Gravitation
grade: 9
subject: Science
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character: Albert Einstein
topic: Theory of Relativity and the Nature of Space
grade: 9
subject: Science
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character: Stephen Hawking
topic: Black Holes and the Nature of the Universe
grade: 9
subject: Science
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