[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.

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"The Drake Equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy."

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

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On behalf of the entire SETI Institute, we wish one and all a safe and happy holidays and a joyous new year, full of wonder and exploration! -- Bill Diamond, President and CEO (Image credit: Danielle Futselaar)

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Drake Equation

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Carl Sagan discusses the Drake Equation, which essentially says that there is a very good chance of life on other planets...http://www.youtube.com/watch?v=MlikCebQSlY

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Drake equation - Wikipedia, the free encyclopedia

We'll Find Alien Life in This Lifetime, Scientists Tell Congress By Nola Taylor Redd, Space.com Contributor | May 24, 2014 Currently, SETI houses only 24 full-time scientists. Of those, two-thirds are from the United States.

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Frank Drake with cosmic equation to gauge the presence of intelligent life in the cosmos. The Drake Equation identifies specific factors believed to play a role in the development of civilizations in our galaxy.<br />

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