In the circular conference hall of the Interstellar Colonization Ethics Committee at the String Light Research Institute, the air was so heavy it felt as if water could be wrung from it. At the center of the oval conference table, a holographic projection displayed the details of the Mars colonization plan proposed by the "Oracle"—the flickering gene maps and physiological modification diagrams resembled keys attempting to unlock the gate to a new era of human evolution. Mozi sat at the head of the table, his gaze calmly sweeping over every member present—among them were geneticists, ethicists, sociologists, philosophers, and ordinary resident representatives from the "New World" community. The debate had already lasted a full eight hours, from dawn to dusk; the sky outside the floor‑to‑ceiling windows had shifted from the pale glow of early morning to deep blue, yet the heat of the discussion showed no sign of abating.
"We must face a reality," the synthetic voice of the "Oracle" rang out steadily in the conference room. It called up a detailed set of comparative data. "If we adopt the traditional terraforming approach to establish a self‑sustaining ecosystem on the Martian surface, it is projected to require fifteen percent of Earth's annual gross product and take at least two centuries. Through targeted epigenetic programming technology, we can enable the first colonists to fully adapt to the Martian environment within thirty years, without altering the human DNA sequence."
Detailed technical specifications appeared on the holographic projection. Epigenetic programming—the elegance of this technology lies in the fact that it does not touch the underlying code of life; instead, it achieves adaptive changes in physiological functions by regulating gene expression. Just as the same musical score can be interpreted in vastly different ways by different performers, the human genome contains the potential to respond to various environments, though this potential lies dormant under normal conditions. The plan proposed by the "Oracle" is to awaken those gene functions that can help humans survive in the Martian environment through precise regulation of DNA methylation patterns, histone modifications, and non‑coding RNA expression.
Specifically, this technology comprises seven key modification modules: enhancing hemoglobin's oxygen affinity so that blood can efficiently carry oxygen even in low‑oxygen‑partial‑pressure environments; adjusting melanocyte activity to provide natural protection against cosmic radiation; optimizing calcium‑phosphorus metabolic pathways to cope with Martian gravity, which is only about one‑third that of Earth's; modifying the photosensitivity of the visual system to adapt to Mars' weaker lighting conditions; enhancing the adaptability of the vestibular system to address spatial‑orientation disorders in low‑gravity environments; adjusting the immune system's response mechanisms to counter potential unknown microorganisms in the Martian environment; and optimizing the epigenetic memory of germ cells to ensure that these adaptive changes can be stably passed on to the next generation.
"These changes are all reversible," the "Oracle" emphasized particularly. "By designing specific epigenetic‑reset sequences, we can restore an individual's original gene‑expression pattern at any time. It's like installing a restore point for the system, ensuring that we do not permanently alter human biological characteristics due to immature technology."
A murmuring discussion rose and fell in the conference room. Harvard bioethics professor Elena Watson was the first to stand and speak, her voice trembling slightly with emotion. "This is not merely a technical issue; it is a fundamental question about human identity. If we begin designing humans according to environmental needs, then the very concept of 'human' will undergo a fundamental change."
Chief engineer Zhang Wei from the Mars Colonization Preparatory Office immediately rebutted, "But Professor, have you considered that if we stubbornly cling to so‑called 'pure' human form, we are actually stifling humanity's possibility of advancing toward the stars? Evolution has never been static; now is simply the first time we have gained the ability to steer the direction of evolution!"
Sociologist Li Mingbo adjusted his glasses, his tone grave. "Historically, every major technological transformation has brought about drastic changes in social structure. If a portion of humanity is modified to adapt to the Martian environment, what kind of social relations will emerge between them and Earth humans? Could this lead to de facto differentiation of the human species? Think about it—when 'Martians' return to Earth, they will need to wear special protective suits and take special medications. Isn't this creating new barriers?"
Environmental‑protection‑organization representative Maya Green stood up abruptly, slapping the table in agitation. "This is a desecration of human dignity! We should not treat ourselves as machines that can be arbitrarily modified. Respecting life begins with respecting the natural evolutionary process of life."
The voices of supporters were equally resounding. Space‑medicine expert Alexander Ivanov presented detailed research data. "According to our twenty‑year simulation experiments, the life expectancy of unmodified humans in the Martian environment will be reduced by at least forty percent. Through epigenetic programming, we can not only eliminate this negative impact but may even enable colonists to achieve a longer healthy lifespan than on Earth."
Interstellar‑exploration advocate Sarah Johnson's remarks provoked deeper contemplation throughout the hall. "The history of human civilization is a history of continuously breaking through environmental limitations. From leaving Africa to crossing oceans, from climbing Mount Everest to diving into the Mariana Trench, we have always been expanding the boundaries of survival. What we face now is merely a continuation of that process. The only difference is that this time we are using more precise, safer technological means."
The debate ebbed and flowed like tides in the conference room. Mozi remained silent throughout, listening carefully to each viewpoint and observing the expressions of every speaker. He noticed that beneath the surface of technical feasibility lay a deeper philosophical dilemma: What is the essence of human existence? Do we have the right to redesign our own biological characteristics? Should the steering wheel of evolution be shifted from natural selection to autonomous choice?
When night fell, Mozi announced an adjournment. But he himself stayed behind in the conference room, sinking into deep contemplation over the complete plan provided by the "Oracle." The data were objective—epigenetic programming was indeed more efficient and economical than terraforming. However, the complexity of human society could never be measured by simple cost‑benefit ratios.
At eleven o'clock in the dead of night, Xiuxiu pushed open the conference‑room door. She had just come from the bio‑computing laboratory, her face still bearing the fatigue of continuous work. "I heard today's debate was intense," she said, sitting opposite Mozi and directly picking up the plan on the table to skim through quickly.
As a top expert in bio‑computing, Xiuxiu immediately grasped the ingenious design in the "Oracle's" plan. "From a purely technical perspective, this plan is almost perfect. Epigenetic programming can indeed achieve major adjustments in physiological functions without altering the DNA sequence. But..." She set down the document, her gaze becoming unusually profound. "This signifies a fundamental turning point in human evolutionary history—a shift from natural selection to self‑design. Once we take this step, there is no going back."
"You think we shouldn't do this?" Mozi asked.
Xiuxiu shook her head. "I'm not making a value judgment; I'm merely stating a fact. Just as humans learned to use fire, invented writing, and developed nuclear energy, this could be another critical juncture in the history of civilization. The question is not whether to do it, but how to do it and why to do it."
Her words reminded Mozi of the many lessons from human history. Technological progress often outpaces ethical reflection; by the time problems arise, it is often too late for remedies.
Early the next morning, Mozi made a major decision. At the reconvened committee meeting, he announced the establishment of a dedicated interstellar‑colonization‑ethics oversight body. This institution would be independent of any administrative system; its members would not only include experts and scholars from various fields but also incorporate ordinary citizen representatives, and even invite religious figures and artists to participate in the discussions.
"We need time to ponder the significance of this decision," Mozi told all the committee members. "This is not a question that can be decided in the short term. It concerns not only the success of Mars colonization but also the development direction of human civilization for centuries to come."
The newly established ethics‑oversight body immediately began work. Their first task was to define the ethical boundaries of genetic modification: Which changes are acceptable? Which are absolutely prohibited? What rights and obligations should the modified "Martian humans" possess? How should their relationship with "Earth humans" be defined? More importantly, how can we ensure that this technology will not be abused?
Over the following month, Mozi presided over more than fifty thematic seminars and public hearings. Through the String Light Research Institute's global network, they gathered opinions from diverse cultural backgrounds and social strata. One surprising phenomenon emerged: the younger generation showed significantly higher acceptance of genetic modification than older generations. Among the 18‑to‑25‑year‑old age group, over seventy percent indicated that they would be willing to accept a certain degree of genetic modification if it would grant them the ability to live freely on the Martian surface.
Meanwhile, the "Oracle" continued to refine its plan. It proposed a phased‑implementation roadmap: the first phase would involve only the minimally necessary modifications, ensuring that all changes were completely reversible; the second phase would gradually expand the scope of modifications under strict monitoring; the third phase would consider deeper modifications that might have permanent effects. It also recommended establishing a global oversight mechanism to ensure that every modification decision underwent ethical‑committee review and that every participant gave fully informed consent.
Late one night a month later, Mozi stood alone on the observatory platform of the String Light Research Institute, gazing through the massive dome at the red planet shining in the starry sky. Mars glimmered quietly among the stars, as if issuing a silent invitation to him. At that moment, Xiuxiu's figure appeared at the entrance of the observatory.
"The ethics committee's preliminary report is out," she said, handing an electronic document to Mozi. "Three hundred pages, each filled with the collision of ideas."
The report did not offer a simple "yes" or "no" conclusion; instead, it proposed a complete ethical‑decision‑making framework. This framework was built upon four fundamental principles: the principle of autonomy, ensuring that every individual has the right to decide whether to accept modification; the principle of non‑maleficence, guaranteeing that modifications will not cause irreversible harm to the individual; the principle of justice, ensuring fair distribution of modification opportunities; and the principle of diversity, preserving the biological and cultural diversity of the human species.
Under this framework, the "Oracle's" plan received conditional support. The committee recommended first conducting a small‑scale volunteer program, progressing step‑by‑step under strict monitoring. At the same time, they demanded continued research into non‑genetic‑modification alternatives, including more advanced terraforming technologies and artificial ecosystems.
"You know," Xiuxiu said softly, looking at Mars, "in the history of biological evolution on Earth, whenever the environment underwent drastic changes, certain species would rapidly evolve to adapt to the new conditions. Now, for the first time, humanity has the ability to actively choose the direction of evolution. This is both a privilege and a heavy responsibility."
Mozi nodded, recalling the final passage of the ethics report: "The meaning of technology lies not in what it enables us to do, but in how it helps us reflect on what kind of beings we should become. Between transforming the environment and transforming ourselves, what we need is not a simple choice, but a deeper understanding of the meaning of life."
When the first volunteers began receiving epigenetic programming, Mozi personally supervised the entire process. Looking into those young people's hopeful eyes, he understood that regardless of the outcome, humanity had already stepped into a completely new era. This era was full of hope yet also fraught with hidden risks. And his responsibility was to ensure that in this new epoch where humanity actively participates in its own evolution, we would not lose the most precious things: reverence for life, curiosity about the unknown, and the courage to find our place in the vast cosmos.
Late at night after supervising the first modification procedure, Mozi wrote in his work journal: "Today, we have not only unlocked new possibilities at the technical level but have also redefined the concept of 'human' at the philosophical level. Epigenetic programming is like a mirror, reflecting our understanding of ourselves, of life, and of the universe. At this critical historical juncture, we need to maintain sufficient wisdom—to bravely embrace change while cautiously safeguarding the values worth cherishing. Because, ultimately, the meaning of interstellar colonization is not about how far we can go, but about whether we can still retain that human heart as we journey toward the sea of stars."