"There is nothing new under the sun."
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This phrase first appeared in the Old Testament book of Ecclesiastes 1:9. The complete verse is: "What has been will be again, what has been done will be done again; there is nothing new under the sun."
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It suggests that everything in the world has already been predetermined by God during the creation, so there is nothing new under the sun.
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I don't have any specific religious beliefs.
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I only know that history tends to repeat itself.
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Especially the mistakes made by humans.
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Unfortunately, some mistakes seem irreversible.
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Once, humans could breathe fresh air on the surface of the earth, but now they have to go underground and breathe filtered air.
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Is this also a cycle?
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Are we replicating the survival mode of the legendary underground people?
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Legend has it that these underground people are of the same origin as modern humans, but due to various reasons, they fell into various crevices on the surface of the earth, such as the bottom of lakes and canyons, and adapted to the environment to become underground people. Or maybe we are just like them, seeking shelter...
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Legends have always been legends, and science has always been science.
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Scientists will tell you that the existence of underground people is confined to science fiction and they cannot possibly survive underground.
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This is based on the analysis of the layered structure of the Earth's four concentric spheres: "inner core, outer core, mantle, and crust." Earthquakes generally occur within the crust, which also undergoes constant changes. The theory further suggests that as depth increases, temperature and pressure within the crust increase. It is believed that for every 100 meters of depth, the temperature increases by 1℃. Previous drilling results have shown that at depths exceeding 3 kilometers, the temperature increases by 2.5℃ for every 100 meters, reaching 200℃ at a depth of 11 kilometers. In such extreme environments, how could ordinary human beings survive?
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However, I believe otherwise.
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Human perception is limited because humans only understand and make judgments based on their own thought patterns, concepts, and accumulated knowledge, while neglecting the fact that nothing is absolute.
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