Aldarion
Egg Nazi
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Saw this article that I thought did a good job of expressing the most likely (in my view) answer
Beyond "Fermi's Paradox" XV: What is the Percolation Theory Hypothesis?
Could it be that the reason we haven't met any aliens is because interstellar colonization simply isn't practical? Not exactly good news for us!
www.universetoday.com
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