Comments by "Digital Footballer" (@digitalfootballer9032) on "Is a Dyson Sphere Possible?" video.

A Dyson "swarm" would be more plausible than a solid sphere. Still way beyond our reach at this time, but could be imagined if you had enough material, along with the technology and ability. They estimate even to build a swarm of solar collectors would still take at least all of the material that makes up the planet Mercury. So we would have to first have to figure out how to deconstruct an entire planet to get the needed materials.
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There is a horizon to the observable universe, which is effectively an "edge" of the universe to the observer at a set point, however this doesn't mark the end of the universe, only a point which cannot be seen past.
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Intelligent and technological life on other planets would likely take a similar form to humans simply because it's a structure that works for moving about, manipulating tools, etc. They more than likely would be upright and bipedal, as creating and using tools would be difficult if you stood and walked on all fours, or more appendages. Crucially, they would be land dwelling and not ocean bound, because as John Michael Godier says, "good luck smelting metal under water". They may not resemble us superficially, but structure wise i would put my bets on them being fairly similar. Nature tends to go with things that work. Structures that don't work go extinct, like the dodo bird, which was good enough being a flightless bird until new types of predators were introduced to their formerly closed environment. Just the same an octopus may be very intelligent, but no octopus like creatures on other planets are building and launching rockets from under water anytime soon.
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A solid sphere wouldn't be practical, aside from the fact of needing ridiculous amounts of material. An array of solar collectors in a swarm would be adequately effective. Still you would need a whole lot of material, but not even close to as much as a solid sphere. Dyson himself later analyzed his own theory and calculated that even at a thickness of 6 meters, the sphere would be torn apart from gravity and pressure, and would take more material to build than is possible to even gather.
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@Puggzy My parents got a set of Cutco knives for a wedding present in 1972, and about 20 years ago the set was given to me. I still use them to this day. They have long outlasted the knives they replaced them with. They have Ebonite handles, the stuff they make bowling balls out of. Rock solid.
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