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35-DrakeEqn2 - Astrobiology Life and Intelligence in the...

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Astrobiology Life and Intelligence in the Universe The Drake Equation —Biological and Sociological Factors—
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The Question of Extra-Aquarian Intelligent Life
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Extraterrestrial Intelligence Sometimes I think we’re alone. Sometimes I think we’re not. In either case, the thought is staggering . Buckminster Fuller
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Frank Drake Author of the Drake Equation
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