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Galactic civilizations may or may not exist. If galactic civilizations exist they are communities of Extraterrestrial aliens. Any alien civilization that we encounter will almost certainly be incalculably far in advance of us technologically. In the opinion of Michio Kaku galactic civilizationsare of three types

  • Type 1 Civilizations have harnessed and controlled the resources of a whole planet.
  • Type 2 Civilizations have harnessed and controlled the resources of a one or more planetary systems and derive their energy from one or more stars.
  • Type 3 Civilizations have harnessed and controlled the resources of a whole galaxy or a large part of it.



References and External links

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