One proposed solution to the Great Filter is the "Alien Zoo" hypothesis, saying powerful aliens keep us alive to observe us. (1/3)
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@slatestarcodex Or, you know, some sort of arbitrary speed limit that kept other stars impractically long travel times away...Thanks. Twitter will use this to make your timeline better. UndoUndo
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@slatestarcodex, has any1 brought up basic energetic constraints that limit sentient expansion? i.e. this http://physics.ucsd.edu/do-the-math/2011/07/galactic-scale-energy/ … -
@slatestarcodex explained w/lighter sense of humor here: http://physics.ucsd.edu/do-the-math/2012/04/economist-meets-physicist/ … & specifically discusses space trvl: http://physics.ucsd.edu/do-the-math/2011/10/why-not-space/ …
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@slatestarcodex Humans look mysteriously good, compared to robots: crewed missions into space have a much higher success rate. :-)Thanks. Twitter will use this to make your timeline better. UndoUndo
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@slatestarcodex Depending on the power level of the aliens, we might not notice anything at all.Thanks. Twitter will use this to make your timeline better. UndoUndo
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