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    Type 1, 2, & 3 Civilizations

    I dont see how 100% of the solar energy can be harvested in a type I or II cilvilization. Effieceny can never be that high, and if the energy from the sun was harvested even remotely close to 100%, the other planets would become so cold they would be inhabitable. I think before we harvested...
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    Kaku and Cassini

    this might be a dumb question... but im kinda new to the forums here, and ive read Hyperspace last summer, and I was curious if Dr. Kaku comes on here at all? Really, I loved the book...