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Where is Everybody? - How many technically advanced civilizations exist in our galaxy?

Essay by Steven Soter, Scientist-in-Residence in the Center for Ancient Studies at New York University. Gedanken experiments, which have been used for hundreds of years by scientists and philosophers to ponder thorny problems, rely on the power of on...

http://www.makeahistory.com/index.php/submit-an-article
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-civilizations-exist-in-our-galaxy
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Tags: science | fraction | colonies | colonization | advanced civilizations | evidence | mechanism | biological | average lifetime | space | system | alien
first added by grrow, last updated 1 years 4 months ago