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An other aspect I have been thinking is fraction of planets that have sufficient metal richness for life or advanced civilizations in first place. So you could

by Ekaros 2y ago

An other aspect I have been thinking is fraction of planets that have sufficient metal richness for life or advanced civilizations in first place. So you could have intelligent life that just doesn't get advanced due to lack of resources...

exe34 2y ago
water worlds - easy to evolve life, much harder to evolve technology.
- bookofjoe 2y ago
  Stephen Wolfram predicts liquid computers
  - exe34 2y ago
    I was thinking more the iron age is hard to access underwater.
    - Ekaros 2y ago
      Bronze age would be challenge. I think stone age is also somewhat questionable. Possible, but much harder.