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> it seems awfully unlikely that none of them have done so yet. Based on what? How did you estimate the probability of a random intelligent civilization sendin
by pavelrub 12y ago
> it seems awfully unlikely that none of them have done so yet.
Based on what? How did you estimate the probability of a random intelligent civilization sending detectable (from Earth) Von Nuemann probes into the universe? For a probability of 1/1000 there could be hundreds of intelligent civilizations within our galaxy without any such probes, and the probability can be much lower than that.