The main issue is managing genetic diseases over deep time -- smaller the starting number the harder it is
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This is why IRL there's projects among communities like Ashkenazi Jews to have v detailed records to track diseases like Tay-Sachs
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Btw for this reason the 50/500 rule assumes a maximally diverse starting population
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The more consanguinity within the population -- i.e. families etc -- the bigger it needs to be obviously
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50 is big enough so that it's unlikely any one genetic disease can take over a whole generation if you're careful
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500 is big enough that, over time, genetic diseases can be bred out of the population w/o sacrificing diversity
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Bc you have enough of a gene pool for mutations and evolution to occur
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Replying to @arthur_affect @pallasinine
Hm, that makes part of my plot harder to work with
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But the i suspect harder question: is it possible that there could be massive objects approaching us so quickly we don't see them until >
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> they're nearly here?
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Sure they just have to not emit very much light
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Space is big and empty and black, finding stuff in it that isn't glowing is a hard problem
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