To the Universe, humanity is like a new species of bacteria experimentally grown on a grain of sand called Earth...
Looking down from the plane: no humans are seen.
Looking out from the center of the Galaxy: Earth is just a small piece of land.
Looking out from the center of the Universe: Earth is just a small grain of sand.
So for the Universe, humans are like a new species of bacteria that has been experimentally cultured on a grain of sand called Earth: If this species of bacteria develops beneficially, it will multiply to other grains of sand, if it develops harmfully, it will be destroyed to test another species.
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