# Drake Equation

BBC - Future - Science Environment - Drake equation How many alien civilizations exist -152752

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watch #documentaries on http://docur.co [astrobiology] The famous Drake Equation put forward by Frank Drake back in the 1961. See also "Rare Earth equation" (a somewhat less trusted equation, but interesting nonetheless). ~Al. A.

Drake Equation - Considerable disagreement on the values of most of these parameters exists. Drake states that given the uncertainties, there are probably between 1000 and 100,000,000 civilizations in the galaxy. {Wikipedia}

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Drake Equation - fp = the fraction of those stars that have planets. {Wikipedia}

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The Drake Equation (Photo Credit: meletver / Fotolia) / http://alien-ufo-sightings.com/2016/08/simple-formula-can-help-find-aliens/

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