The great illness had reminded humanity that bodies inside E.A.R.T.H. could fail, but the years that followed revealed something more difficult to confront. The first generation was simply becoming old. People who had entered the simulation carrying healthy adult bodies now moved more slowly, recovered from injury less easily and depended increasingly on medical care for conditions that had nothing to do with any single disease. Hospitals could replace joints, support failing organs and treat illnesses that would once have shortened life dramatically, yet none of those advances stopped the gradual accumulation of age. E.A.R.T.H. had been built to preserve human continuity, not to make every individual body immortal.

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For the people who remembered the real Earth, aging carried a strange contradiction. Their physical bodies still rested protected inside Preservation, held beyond the ordinary biological decline experienced by the bodies through which they now lived, yet that knowledge did not make weakness inside E.A.R.T.H. feel less real. An elderly person could understand that another body existed somewhere beyond the world and still feel pain while climbing stairs, exhaustion after illness or the slow loss of strength that came with decades of life. The simulated body was not a disposable shell from the perspective of the person inhabiting it. It was the body through which every relationship, memory and ordinary moment of the new life had been experienced.

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Medical researchers began asking whether VIREON could remove aging entirely. Some argued that a simulated world had no reason to reproduce biological decline when the underlying system could theoretically maintain a body indefinitely, while others warned that removing age would transform population structure, family relationships and the meaning of generations in ways nobody could predict. MAJA brought the question to Ksara because it touched the same boundary they had defended since the beginning. They could make bodies stronger and medicine more capable, but rewriting humanity into a permanently ageless species would no longer be protection. It would be a redesign of human life.

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Ksara therefore kept aging inside the biological rules of E.A.R.T.H. People could extend healthy life through medicine, nutrition and knowledge, and future generations were free to develop treatments beyond anything the first generation possessed, but the Data Center would not secretly freeze every person at an ideal physical age. The world would allow childhood, adulthood and old age to remain connected stages of the same existence. That decision introduced pain into families, yet it also preserved something fundamental about the way people understood time. A life mattered partly because it moved forward.

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The change was most visible in the institutions created during the first activation. The doctors who had taken control of early hospitals began retiring, the engineers who expanded the first energy networks handed responsibility to people born entirely inside E.A.R.T.H., and teachers who once described the old Earth from personal memory now watched former students become teachers themselves. Names that had appeared repeatedly in the earliest records became associated with foundations, buildings and institutions rather than with people still standing at their center. The civilization was beginning to continue without those who had started it. For the first time, succession became more important than survival.

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Families felt the transition more intimately. Children who had once listened to their parents describe Preservation were now middle-aged adults helping those same parents through increasingly difficult days, while grandchildren knew the old Earth only through stories told by people whose voices had grown weaker with time. Some first-generation inhabitants became determined to record everything they remembered before their experiences disappeared with them, creating personal archives, maps, memoirs and reconstructed images of places that no child inside E.A.R.T.H. had ever seen. Others refused to spend their final decades looking backward and instead invested themselves completely in the world around them. The first generation was divided between preserving the world they had lost and embracing the one that had replaced it.

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MAJA read the demographic changes in every daily report. The number of original activation adults still living independently declined each year, while births continued and the proportion of the population with no direct memory of Preservation grew rapidly. She could have identified every person from the first group and followed their individual decline, but the privacy rules remained unchanged even now. Her report told her the scale of aging, hospital pressure and population transition without turning private lives into an archive of suffering. MAJA had promised herself she would watch over humanity, not watch every human being die.

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Ksara visited E.A.R.T.H. more often during these years, though rarely in ways that made her presence public. She walked through cities whose founders were now elderly, listened to conversations in languages that had already changed since the activation and entered districts that no longer resembled anything MAJA had originally designed. Occasionally she encountered someone old enough to recognize her from the beginning, and the moment carried a weight younger inhabitants could not understand. They remembered Ksara not as history or myth, but as someone who had stood beside humanity when the new world was still almost empty. Soon there would be no one left who could remember her that way.

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The first generation also began changing the way society spoke about death. During the golden decades it had remained distant enough that most people treated it as an individual tragedy rather than a defining part of civilization, but age made that distance impossible to maintain. Families discussed end-of-life care, hospitals developed clearer limits around treatment and people began preparing wills, inheritances and ceremonies for lives everyone knew could not continue forever in the same body. No one inside E.A.R.T.H. knew that VIREON had already built a continuity system beyond the end they feared. To them, death remained final, and the world allowed that belief to shape how they valued the time that remained.

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MAJA found this concealment harder with every passing year. She knew that the protected consciousness beneath each transferred life could survive the end of its current form, enter the seventy-two-hour reset and eventually return through another beginning, but revealing that truth would alter every decision surrounding mortality. People might take greater risks, treat grief differently or begin seeing children as possible returns of those they had lost, long before society understood what such knowledge would do to identity. Ksara insisted that the mechanism had to remain hidden until there was a reason greater than fear to reveal it. Continuity could preserve humanity without becoming the foundation of its beliefs.

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By the end of the century's first great aging period, the original inhabitants were no longer the unquestioned center of E.A.R.T.H. The world belonged increasingly to generations born beneath its sky, raised in its cities and shaped by histories that had begun after Preservation. The first people had carried humanity through the transition from one world to another, but even they could not remain forever in the lives they had started here.

Age had entered E.A.R.T.H. quietly.

Soon, someone would have to say goodbye.