Freeman Dyson: Heretical Thoughts About Science and Society
Boston University / 2010
https://www.youtube.com/watch?v=8xFLjUt2leM
Is that one who talking about Dyson Sphere around star?
Yes, there is an entry here:
https://en.wikipedia.org/wiki/Dyson_sphere
Origin of conceptQuote
The concept of the Dyson sphere was the result of a thought experiment by physicist and mathematician Freeman Dyson, when he theorized that all technological civilizations constantly increased their demand for energy. He reasoned that if human civilization expanded energy demands long enough, there would come a time when it demanded the total energy output of the Sun. He proposed a system of orbiting structures (which he referred to initially as a shell) designed to intercept and collect all energy produced by the Sun. Dyson's proposal did not detail how such a system would be constructed, but focused only on issues of energy collection, on the basis that such a structure could be distinguished by its unusual emission spectrum in comparison to a star. His 1960 paper "Search for Artificial Stellar Sources of Infra-Red Radiation", published in the journal Science, is credited with being the first to formalize the concept of the Dyson sphere.[2]
However, Dyson was not the first to advance this idea. He was inspired by the 1937 science fiction novel Star Maker,[4] by Olaf Stapledon, and possibly by the works of J. D. Bernal.[5]
whole this concept is ridiculus and i doubt that most -ultra advanced civilization
if exists such a one made something similar
BUT concept with dark mather or with dark energy is a good one.
bad thing is ..because we don't know what they are :)