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13 years ago|12.5K views

Carl Sagan Explains the Drake Equation

FreeScienceLectures 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*