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    Carl Sagan Explains the Drake Equation


    by FreeScienceLectures

    9 751 views The most famous American astronomer and astrophysicist Carl Sagan explains the Drake equation.

    The Drake equation (rarely also called the Green Bank equation or the Sagan equation) is a famous result in the speculative fields of xenobiology, astrosociobiology and the search for extraterrestrial intelligence.

    The Drake equation states that:
    N = R*