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Pre-human civilizations on Earth
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04-13-2018, 05:14 AM
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L.J.Steele
Join Date: Apr 2005
Re: Pre-human civilizations on Earth
We might not recognize it -- anyone else see the discussion of the invisible gorilla effect on SETI.
http://www.techtimes.com/articles/22...ark-matter.htm
L.J.Steele
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