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usualgerman · 7 days ago · link · · parent · post: Advanced Civilizations Could be Indistinguishable from Nature
Wouldn’t life have to spring up pretty quickly to make this feasible? To get from primordial cells to us took 5 billion years. Then it’s 2K years per system, which might mean 2.5 million stars 10 billion years after life begins on the planet in question. There are 100 billion in just the Milky Way (and I think anyone outside of that could safely be neglected as we cannot possibly detect them. So less than 1% of all stars in a galaxy within several billion years? I just don’t understand why anyone was asking the question.