Transcript
3UuPjYqs95g • NOVA scienceNOW | Cosmic Perspective | Intelligent Life
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Kind: captions Language: en and now for some final thoughts on the search for life in the universe I've always wondered how we would fare if the search for intelligent life in the universe were conducted by intelligent aliens in another star system suppose they used radio waves to observe us and suppose they had super sensitive detectors with specially designed decoders imagine what they would find if they fell within our radio bubble that expanding sphere of waves from the dawn of our broadcast Technologies then the aliens would first hear our early radio programs like Amos and Andy as these signals pass them by some years later they might decode TV programs such as the howdy Duty show then comes The Beverly Hillbillies followed by graphic images from the Vietnam and Gulf Wars the aliens might then look at technology markers in our atmosphere and find high r ration areas from nuclear test blasts and Global greenhouse warming from the burning of fossil fuels after all that what else could the aliens possibly conclude but that Earth shows no signs of intelligent life meanwhile with the growth of Internet radio and cable television Earth May one day fall silent to eavesdropping aliens with no broadcast signals for them to decode they might wonder if we disappeared completely but more likely they will conclude as do those on Earth who search Elsewhere for intelligence that the absence of evidence is not the same as the evidence of absence and that is the cosmic perspective