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How Will Future Civilizations Survive the Accelerating Expansion of the Universe?

In his recent essay, “Securing Fuel for Our Frigid Cosmic Future,” Abraham Loeb writes that “we do not know of any technology that enables moving stars around,” and “Sun-like stars only shine for about ten billion years (of order the current age of the Universe) and cannot serve as nuclear furnaces that would keep us warm into the very distant future.” Fortunately, however, all is not lost. Instead of using the energy output from Sun-like stars, Loeb says advanced civs could migrate into rich clusters of galaxies.

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