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<blockquote data-quote="Ryujin" data-source="post: 6652101" data-attributes="member: 27897">Well, yes and no. What is the minimum length of time before intelligent, tool using life can evolve? How long does it take for that life form to develop interstellar travel technology? What is the life expectancy of such intelligent life, before it kills itself off? Is it even possible to circumvent the light barrier in a manner that permits life, or even machinery, to span the distance between solar systems? If not, will life develop that can see a benefit in creating vessels that will not reach other star systems in their own lifetimes, or even in a hundred generations?I think that it's far more likely for us to detect an alien transmission, as evidence of intelligent life elsewhere, than it is for us to ever meet such life. Even then, you might imagine that the universe would be full of such transmissions to be detected, even today. Even if the time period in which a civilization uses radio emissions was very short, a universe in which alien life was plentiful should see a fair bit of intelligent transmission.</blockquote>

[QUOTE="Ryujin, post: 6652101, member: 27897"] Well, yes and no. What is the minimum length of time before intelligent, tool using life can evolve? How long does it take for that life form to develop interstellar travel technology? What is the life expectancy of such intelligent life, before it kills itself off? Is it even possible to circumvent the light barrier in a manner that permits life, or even machinery, to span the distance between solar systems? If not, will life develop that can see a benefit in creating vessels that will not reach other star systems in their own lifetimes, or even in a hundred generations? I think that it's far more likely for us to detect an alien transmission, as evidence of intelligent life elsewhere, than it is for us to ever meet such life. Even then, you might imagine that the universe would be full of such transmissions to be detected, even today. Even if the time period in which a civilization uses radio emissions was very short, a universe in which alien life was plentiful should see a fair bit of intelligent transmission. [/QUOTE]

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