Intelligent systems are essentially immortal, so once created they can populate whole galaxies.
Interstellar Expansion WITHOUT Faster Than Light Travel at https://www.youtube.com/watch?v=yWlpNm1C5gw Intelligent systems are essentially immortal. The Milky Way is only about 106,000 light years. At 1 milliLightYear per year, that means a machine and human based expansion could cover it in 106 Million years. Most galaxies that reach the point they can store memories and learning
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