character: Drake Equation
topic: Estimating the Number of Communicative Civilizations
grade: 11
subject: Physics
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character: Rationale behind the Drake Equation
topic: The factors influencing the potential for extraterrestrial life
grade: 11
subject: Physics
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character: Fermi Paradox
topic: The question of why we have not found evidence of extraterrestrial civilizations
grade: 11
subject: Physics
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character: SETI (Search for Extraterrestrial Intelligence)
topic: Scientific efforts to detect communication from alien civilizations
grade: 11
subject: Physics
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