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Message: [QUOTE="Eleanor McHugh, post: 4637402"] The clue is in the name: Dyson spheres were hypothesised by Freeman Dyson and I believe the general concept was first popularised by Larry Niven in his Ringworld novels. I was being somewhat flippant as I doubt humanity will be here in a billion years, but if we are it would speak poorly of us if we failed to advance our technology sufficiently to fully utilise the energy output by our nearest star. After all, it only took a billion years or thereabouts for the earliest multi- cellular life-forms to evolve into modern humans... It might. However whether or not we will ever detect evidence of one is dependant on the probability of a particular chain of events: 1. life exists elsewhere in the universe; 2. that life has thrown up an active intelligence; 3. that intelligence is sufficiently social to survive for a significant geological timeframe; 4. the resulting society develops sufficiently advanced technology to reengineer the structure of their solar system; 5. having achieved that level of technology they then have the will to use it; 6. and all this has already happened. Ellie Eleanor McHugh Games With Brains [URL]http://slides.games-with-brains.net[/URL] [/QUOTE]