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Q&A Can two civilizations on nearby stars develop independently but be at a similar technological level?

One thing that a few science fiction films seem to get wrong: it is extremely unlikely for two civilizations to evolve completely independently and yet be within a few hundred years of each other t...

14 answers  ·  posted 10y ago by System‭  ·  last activity 8y ago by System‭

Question technology civilization technological-development