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The starry sky at night is very peaceful, and this is everyone's free time. The greatest human being in every era is always the one with the richest imagination. Is light really the fastest? There is two-way foil, but is there such a thing as four-way foil? One dimension, two dimensions, three dimensions, four dimensions, five dimensions and six dimensions? The essence of hydropower is the use of gravity. Maybe there is gravity everywhere around you and me, but what if we look further ahead? Is there any gravity? Can gravity generate electricity? There is also the most interesting black hole, which can swallow even light. So how does it swallow it? Is it useful? What exactly is the legendary dark matter? (Everything in this article is purely fictitious! But sometimes fictitious things are also beautiful!) A science fiction novel that is not serious at all!