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If just .001% of 10 billion Earth-like planets orbiting sun-like stars in the Milky Way have harbored advanced, intelligent life, shouldn’t we have seen some kind of evidence of their past existence, since this would equal 100,000 civilizations?

Great question! Complicated answer. Let’s start by looking Earthward at ourselves, then we’ll compare that looking spaceward toward the stars. As you know, homosapiens are the advanced, intelligent life form on Earth which is now technologically advanced and space faring. Now by some estimates, humans have been on this planet only for the last 200,000 […]

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