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I believe that life as we know it exists somewhere else in the universe .
Has anyone calculated like "the odds" of it probabalistically?
I'm not sure exactly how else you might calculate it, but, we know life is possible, so in an infinitely large universe, containing infinite stars with infinite planets existing for an infinite amount of time, the odds of life existing on another planet can't be less than 100%.
The Drake Equation is a probabilistic formula meant to derive the number of civilizations which humans could potentially communicate with.
The fermi paradox does challenge the formula though, as it implies fi and/or fc are very small or zero.