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Drake's Equation 2nd parameter f_p: What fraction of stars form planets?
8.59e-1
37
17 comments
17
Fermi Paradox Series
Drake's Equation 3rd parameter n_e: What is the average number of habitable planets per star?
4.53e-2
26
11 comments
11
Fermi Paradox Series
Drake's Equation 4th parameter f_l: On what fraction of habitable planets does any form of life emerge?
4.74e-4
42
24 comments
24
Fermi Paradox Series
Drake's Equation 5th Parameter f_i: On what fraction of habitable planets with life does intelligence evolve?
2.62e-4
28
10 comments
10
Fermi Paradox Series
Drake's Equation 6th parameter f_c: What fraction of planets with intelligent life are capable of interstellar communication?
1.65e-1
30
14 comments
14
Fermi Paradox Series
Drake's Equation 7th parameter L: For how many years does a civilization remain detectable?
29.2k
28
23 comments
23
Fermi Paradox Series
By 2100, will the human population decrease by at least 10% during any period of 5 years?
30%
55
18 comments
18
Ragnarök Series
Ragnarök Question Series: overview
14
5 comments
5
Ragnarök Series
Discussion page for the Fermi Paradox question series
13
1 comment
1
Fermi Paradox Series
Conditional on civilization launching one or more von Neumann probes by 2200 that will reach another solar system within 100,000 years, what will be the average speed of the fastest one, in c?
9.1e-2
6
14 comments
14
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