Comments by "American Plague" (@American-Plague) on "Are We Alone?" video.
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While that is true, if life arises in other places it's just as possible that it arose as long ago as the star is far away. Example: it's just as possible for life/a civilization to have arisen 10,000 years ago in a solar system that is 10,000 light years away. Meaning if they also used radio waves (or some form of waves) as communication (the fact that technology builds on itself almost guarantees that at some point an intelligent civilization would do this) as a form of communication, those signals would be getting here right now. So we'd be able to detect them. The same would be true of any star. However, to respond and have them get it would take another 10,000 years by which that time they may no longer be using radio waves, may have died, or who knows..maybe still be there and respond back....which would take another 10,000 years....20,000 years from now. Point being, it all depends on how far away said star/planet is and how long ago their civilization sent a signal.
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