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28/05/1930 American astronomer Frank Drake is born

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A Message from Frank Drake

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Frank Drake: First Contact (Science Shorts)

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Frank Drake on the Current State of SETI

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Drake Equation

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Drake's Equation - A Deep Dive | Answers With Joe

He is known because of his equation for estimating the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. Drake formulated the equation not for purposes of quantifying the number of such civilizations, but to stimulate dialogue at the first scientific meeting on the search for extraterrestrial intelligence.
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