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Q&A Space Travel Without Understanding How to Create Atomic Weapons?

I have a universe where humanity has produced various civilizations on multiple planets (and no planet has achieved a single world government); and very few of these countries possess the know-how ...

10 answers  ·  posted 9y ago by shiningcartoonist‭  ·  last activity 8y ago by shiningcartoonist‭

Question space travel space-travel weapon-mass-destruction