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aliens are still uncorfirmed to date but however in 1961 astronmer frank drake invented a formulae to calculate how many communicative civilzations are in the milky way his formulae follows:
N=R* Fp ne Fl Fi Fc L
N= 10x0.5x2x1x1x0.5x10000
N= 10000 communicative civilzations
This is what drake came out in 1961. sadly, the formulae was done again and from 10000 to 2.31 so is there 10000 2 or 3 civilaztions in the milkway or are we the only ones
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