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traggthuyy@gmai traggthuyy@gmai
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5 years ago
Briefly summarize current knowledge about the term flife in the equation
Number of Civilizations = NHP  flife  fcivilization  fnow.
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
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Charline091486Charline091486
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5 years ago
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