Quote:
Originally posted by punkworld
Want the number of technological civilizations in the universe?
Here: <i>N = R<sub>*</sub> f<sub>p</sub> n<sub>e</sub>f<sub>l</sub> f<sub>i</sub> f<sub>c</sub>L,</i> <i>R<sub>*</sub></i>
Now just go and fill in the variables, and you're done.
And for everyone that has an opinion about this: You're probably wrong. We have no way yet to know what the probability of life spontaneously developing is, and have not yet been able to recreate the event in labs. So, until we know that, you can say very little about chances of alien civilizations existing.
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Drake Equation? Not really useful without f<sub>l</sub>.
Like you I have no opinion on the odds.