The Great Silence - the Controversy Concerning Extraterrestrial Intelligent Life. Brin, G. D. Quarterly Journal of the Royal Astronomical Society, 24:283–309, September, 1983.
The Great Silence - the Controversy Concerning Extraterrestrial Intelligent Life [link]Paper  abstract   bibtex   
Recent discussions concerning the likelihood of encountering extraterrestrial technological civilizations have run into an apparent paradox. If, as many now contend, interstellar exploration and settlement is possible at non-relativistic speeds, then reasonable calculations suggest that space-faring species, or their machine surrogates, should pervade the Galaxy. The apparent absence of evidence for extraterrestrial civilizations, herein called 'the Great Silence' places severe burdens on present models.
@article{brin_great_1983,
	title = {The {Great} {Silence} - the {Controversy} {Concerning} {Extraterrestrial} {Intelligent} {Life}},
	volume = {24},
	issn = {0035-8738},
	url = {http://adsabs.harvard.edu/abs/1983QJRAS..24..283B},
	abstract = {Recent discussions concerning the likelihood of encountering 
extraterrestrial technological civilizations have run into an apparent
paradox. If, as many now  contend, interstellar exploration and
settlement is possible at non-relativistic speeds, then reasonable
calculations suggest that space-faring species, or their machine
surrogates, should pervade the Galaxy. The apparent absence of evidence
for extraterrestrial civilizations, herein called 'the Great Silence'
places severe burdens on present models.},
	urldate = {2020-05-23},
	journal = {Quarterly Journal of the Royal Astronomical Society},
	author = {Brin, G. D.},
	month = sep,
	year = {1983},
	pages = {283--309},
}

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