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The branch of mega-engineering and physics concerned with the practical construction, stabilization, and operation of the unimaginably vast structures and energy systems required by high-level Kardashev civilizations. It's the "nuts and bolts" of godlike power: the math for stabilizing a rotating ringworld, the materials science for a Dyson Sphere's solar-collector panels, or the orbital dynamics for moving stars. This is the applied engineering manual for beings who treat planets as LEGO bricks and stars as furnaces.
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