N e = mean number of planets that could support life per star with planetsį l = fraction of life-supporting planets that develop lifeį i = fraction of planets with life where life develops intelligenceį c = fraction of intelligent civilizations that develop communication N = number of civilizations with which humans could communicateį P = fraction of stars that have planets But how likely is it that other “advanced civilizations” exist in the universe?Īstrophysicist Frank Drake once wondered the same thing, and in 1961, he proposed a formula to estimate the odds. The Dark Forest Theory deals with the possibility of “intelligent life” beyond planet Earth. Francisco Alexander Rodriguez on Instagram asked us to look into the Dark Forest Theory. This week, we encounter a question about space. Every other Friday on Morning Edition, the Outside/In team answers a question from a listener about the natural world.
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