character: Carl Sagan
topic: Influence on Astrobiology and SETI
grade: 11
subject: Physics
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character: Enrico Fermi
topic: Fermi Paradox and its implications for astrobiology
grade: 11
subject: Physics
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character: Frank Drake
topic: Drake Equation and its significance in SETI
grade: 11
subject: Physics
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character: Stephen Hawking
topic: Theoretical contributions to the search for extraterrestrial intelligence
grade: 11
subject: Physics
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