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This topic is beautifully (as usual) covered on http://waitbutwhy.com/2014/05/fermi-paradox.html http://waitbutwhy.com/2014/05/fermi-paradox.html
by extesy 10y ago
This topic is beautifully (as usual) covered on http://waitbutwhy.com/2014/05/fermi-paradox.html http://waitbutwhy.com/2014/05/fermi-paradox.html