If there're billions of earth like planets w/in habitable distances of sun like stars, odds favor intelligent life existing, no?
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especially if a % of the planets are more evolved than earth is, I would think many advanced civilizations could have existed.
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They'd be so far ahead (like us vs. ants) that w/i bllns of galaxies we've observed we'd see them (as we are obvious to ants).
End of conversation
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Life being too complex could imply that it predates life on Earth and is by now ubiquitous http://phys.org/news/2013-04-law-life-began-earth.html …
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