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The Drake Equation

Make your own estimate for the number of communicative civilizations in the Milky Way.
Throughout the ages, many have wondered whether intelligent life exists elsewhere in the universe. More recently, SETI scientists have wondered whether we might be able to detect signals from their civilizations. In 1961 Frank Drake of Cornell University devised a formula to estimate the number of communicative civilizations in the Milky Way, which came to be called the Drake Equation. It consists of seven variables. If we can accurately estimate the values of these variables, such as the number...

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