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Home Q & A Board Science-Related Homework Help Physics Astronomy
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elmajn elmajn
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5 years ago
Briefly explain the purpose of the equation
Number of Civilizations = NHP  flife  fcivilization  fnow.
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
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MaargarytaSizMaargarytaSiz
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5 years ago
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elmajn Author
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5 years ago
Smart ... Thanks!
jakechambo3
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Yesterday
Good timing, thanks!
jodie1
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2 hours ago
Thanks
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