Dyson Sphere
One civilization is judged over the energy consumption . Classification of Living civilization between different tiers is based on the amount of energy they consume in a finite time period . we earthlings want to know everything our sky of curiosity is limitless . Imagine u wake up mid night because ur A.C get off u peep out from your windows you observe everything is dark in short light of your city I get off , not your city but whole grid of these blue planet get off , that will be worst nightmare of all time of everyone , Running out from energy , theoretically it is not possible . Sun is our main source of energy everyday this sun rays hits earth responsible for all living organism to sustain . now somehow human able to harness this sunrays into electricity . For instance we are only able to get yield of this energy by just some small part of this energy what if we extract wholesome energy from this star , sounds fictionally . The idea of dyson spher