The term terraform was first introduced by science fiction writer Jack Williamson in 1942. Today, it is an interesting topic to discuss. The term combines the Latin word terra (Earth) with the verb form, meaning to shape or create. Initially, it started as a science fiction concept; terraforming has since become a subject of scientific inquiry, especially if we are concerned about the potential colonization of other planets. Essentially, terraforming, the theoretical process of transforming a planet’s environment to make it Earth-like, has long been a staple in science fiction. From Kim Stanley Robinson’s Mars Trilogy to Hollywood’s Total Recall, the idea of reshaping barren worlds into habitable oases has fired imagination. However, in 2025, with SpaceX testing interplanetary Starships, and NASA and ESA accelerating plans for Moon and Mars infrastructure, a very important question emerges:Is terraforming still fiction, or are we finally witnessing its scientific infancy?By contrast, this study seeks the science, technology, and ethical frameworks emerging in planetary engineering. We primarily focused on Mars, which is the most studied terraforming candidate. Therefore, we believe that you will find an answer to this question after reading this article.1. The Science Behind TerraformingTerraforming, or planetary engineering, refers to the modification of a celestial body; however, it requires altering key planetary parameters to support human life.Atmosphere (pressure, composition)Temperature (to support liquid water)Surface conditions (to host life, ecosystems)Magnetosphere (for radiation shielding)The goal is to create a self-sustaining biosphere that supports human life without life-support systems. We know that Earth remains the only known habitable planet, and Mars stands as our best candidate for the following reasons:Day length (24.6 hrs)Manageable gravity (0.38g)Polar ice caps and suspected subsurface waterAtmospheric CO₂ (useful for greenhouse effect)2. Why do Mars — And Not Venus, Europe, or Titan?Among the many celestial bodies in our solar system, several have been proposed as candidates for future human colonization or terraforming. Previously, our natural satellite Moon was assumed to be a suitable candidate for terraforming. However, Mars consistently appears to be the most viable option, not because it is hospitable but because it is the least inhospitable. In 2025, with extensive robotic exploration, surface mapping, and successful ISRU tests already underway, Mars moved from speculative fiction to scientific priority. We compared the key planetary characteristics to explain why Mars holds the lead in terms of terraforming interests:| Feature | Mars | Venus | Titan / Europa ||----|----|----|----|| Distance from Earth | 6–9 months | 3–5 months | 6–10 years || Temperature | -60°C avg | 470°C avg | −179°C (Titan) || Atmosphere | Thin (CO₂) | Dense (CO₂ + SO₂) | Almost none (Europa) || Gravity | 0.38g | 0.9g | Low || Pressure | 0.6% of Earth | 92x Earth | Negligible || Accessibility | Robotic missions/rovers | Harsh landers only | Icy, extreme radiation |Venus requires extreme de-acidification and atmospheric removal, and the Titan is too cold and distant. Mars appears to be a blend of scientific plausibility and logistical reachability.3. Current Scientific Progress in Terraforming (as of 2025)It is obvious that planet-wide terraforming remains a long-term and ambitious goal; however, significant progress has been made in recent years toward developing foundational technologies that could make this possible.As opposed to trying to change such an entire planetary ecosystem in one go, scientists and engineers are looking into modular, scalable fixes, that is, tools and techniques that can first be tried out and scaled in a controlled setting, potentially one small step at a time.In 2025, several of these enabling technologies are under active research, for example, in situ oxygen production and greenhouse gas generation for microbial ecosystem engineering and radiation shielding. These developments are among the initial gains in gradual steps toward working out a hostile world to an environment that has the possibility of being inhabitable by human beings.A. In-Situ Resource Utilization (ISRU)A major breakthrough toward supporting long-term human presence on Mars came with NASA’s MOXIE aboard the perseverance rover in 2021. MOXIE successfully showed that oxygen can be extracted from the Martian atmosphere, which is primarily composed of carbon dioxide (CO₂). It produces approximately 6 g of oxygen per hour. By 2025, the success of MOXIE has led to the development of scaled prototypes to enable future missions to help generate breathable air and rocket fuel on Mars. Similar efforts are also concerned with the European Space Agency (ESA) and China, announcing that they will have their own demos of ISRU technology, which is a global race to become a resource independent of the Red Planet.B. Greenhouse Gas GenerationMars do not have enough atmospheric pressure and warmth to sustain liquid water or a habitable biosphere. The main idea behind terraforming is the artificial enhancement of the greenhouse effect. Theoretically, this could be achieved by sublimating CO₂ from polar ice caps using space-based orbital mirrors or by darkening the surface with dust to absorb more solar energy. Another method involves the manufacture and release of perfluorocarbons (PFCs), which are powerful greenhouse gases that are far more effective than CO₂ in trapping heat. However, a major study published in 2018 by NASA scientist Bruce Jakosky estimated that there is not enough accessible atmospheric CO₂ on Mars available to produce significant atmospheric thickening. Accordingly, large-scale atmospheric engineering would probably need to import volatile compounds on other planets, a scheme that is currently beyond our means or capacity.C. Bioreactors and Synthetic BiologyThe field of astrobiotechnology gained significant attention and momentum in 2025 in the context of terraforming. Development of radiation-resistant microorganisms within the context of synthetic biology (SynBio) is currently being actively pursued by companies attempting to engineer the major ecological roles that life-sustaining systems require. These microbes are designed to fix nitrogen, produce oxygen, and biomineralize Martian regolith. This process transformed it into a more Earth-like soil structure. Additionally, research teams at MIT and the University of Tokyo are developing experimental biocrust-engineered microbial mats capable of surviving in Martian surface conditions. These biocrusts are supposed to simulate the natural ecosystem and, in the end, may be used as the first layer of the biosphere on Mars capable of sustaining itself on its own.D. Magnetic ShieldingThe lack of a planetary magnetosphere has always been one of the most significant long-term obstacles in terraforming Mars. Without this magnetic protection, Mars is continuously bombarded by solar winds and cosmic radiation. This not only poses a danger to human health but also gradually strips away any attempt to build a stable atmosphere. To respond to this, scientists at Jet Propulsion Laboratory (JPL) of NASA are conducting studies on the emplacement of magnetic dipole stations on L1 Lagrange Point on Mars (a position where the pull of gravitational force between the Mars and the Sun is neutralized). These proposed stations would act as giant space-based electromagnets, which are expected to deflect solar particles before they reach the Martian atmosphere. Originally proposed in 2017, this concept has regained attention in 2025 owing to breakthroughs in superconducting materials and compact space-based nuclear power systems, making the prospect of magnetic shielding increasingly plausible.4. Scientific LimitationsWe have mentioned some breakthroughs; however, terraforming remains scientifically premature on a planetary scale. Some of the most notable challenges include the following.🔹 TimeframesEven with ideal technology, warming Mars or thickening its atmosphere will take centuries to millennia. Microbial terraforming (biosphere seeding) might have taken longer than Earth's 3.8 billion years of evolution.🔹 Resources and CostEstimates to terraform Mars run into trillions of dollars, which involvingHundreds of nuclear devices (if used for melting poles — a controversial idea),Thousands of transport missions,Massive on-site manufacturing for PFCs, infrastructure, and shielding.🔹 Ethical and Legal ConcernsTerraforming is not a simple process as it raises profound ethical and legal questions that extend beyond science and engineering. The biggest ethical question is whether it is acceptable to change the ecosystem of an entire planet and whether it is morally right to change one with the possible existence of primitive, even unknown forms of life. If microbial life exists or once on Mars, should it be preserved as a unique biological heritage, or can it be ethically displaced for human benefit? Some argue that terraforming is an act of planetary colonialism. It imposes Earth-centric values on an alien environment without consent or full understanding of its natural history.In addition to moral questions, legal uncertainty complicates the future of terraforming. The national appropriation of celestial bodies is forbidden in the 1967 Outer Space Treaty signed by more than 100 countries, and space is a haven encouraged as the province of all mankind. However, it is rather quiet about corporate ownership, use of privately owned land, and extensive ecological manipulation. Such legal uncertainty opens up the possibility of commercial activities that may exist without regulations and geopolitical conflicts over terraformed areas. Private space actors such as SpaceX, Blue Origin, and international consortiums have gained capabilities to alter extraterrestrial environments. Therefore, new legal frameworks and planetary protection protocols are essential for ensuring that exploration is not exploited. A few complications are yet to be clarified.Is altering another planet moral?Do hypothetical Martian microbes (if found) deserve preservation?Who governs the terraformed world? The Outer Space Treaty (1967) prohibits national sovereignty claims but leaves corporate colonization in a gray area.5. Terraforming in the Context of Modern Space MissionsAre you worried about the aforementioned technical limitations? Worry not as science never says it is impossible. Although full terraforming is speculative, precursor technologies are becoming real. Let us consider the following examples:| Mission / Project | Contribution toward Terraforming ||----|----|| SpaceX Starship (2025 test flights) | Enables mass transport of ISRU gear & habitats || Artemis Gateway (NASA) | Tests off-Earth habitat systems and power systems || MOXIE and ESA's ERICA project | Develop autonomous ISRU prototypes || Redwire & Made In Space | Pioneering 3D-printing from regolith-like simulants || DARPA/NASA nuclear reactors | Provide power for long-term outposts |In essence, what was pure fiction in the 1980s is now in the prototype and proof-of-concept stages.6.Terraforming vs. ParaterraformingAlthough terraforming tries to transform the whole environment of a planet, paraterforming attempts to establish controlled and habitable ecosystems inside the enclosed habitats of buildings: a more realistic near-future solution to maintaining life.✅ A Realistic 2025 Alternative: Paraterraforming Instead of altering an entire planet, paraterraforming involves the following steps:• Creating domed, earth-like ecosystems on the surface or underground.• Bioengineered plants and cyanobacteria can be used to recycle air and water. These habitats, already in conceptual design (e.g., NASA's Mars Dune Alpha or China's "Lunar Palace’), are:• Technically feasible within 10–20 years,• Scalable in modular form,• It is ethically safe and environmentally reversible.7.Internet Communications InfrastructurePhysical life-support capability will only be part of what is necessary on terraformed or semi-terraformed Mars; it will also need an active and self-sustaining communication network to maintain human stay, plan and direct robotic operations, and interface with Earth features. NASA, ESA, and other companies (e.g., Lockheed Martin, Starlink) have recently been working towards interplanetary versions of Internet protocols, expanding on earlier protocols such as Delay-Tolerant Networking (DTN). These protocols are designed to enable reliable data transmission across vast interplanetary distances.They accommodating high latency and frequent disruptions, which are crucial for maintaining a stable Mars–Earth data link where one-way communication delays can exceed 20 min. In addition, Spacecoin, as the world’s first blockchain-powered DePIN initiative, launched LEO nanosatellites, such as CTC 0 (in orbit since December 2024), to pioneer token-incentivized, decentralized Internet infrastructure. This lays the potential foundation for a trustless, resilient Martian communication network. Future Martian communication networks are likely to be combined• Mar-based satellite constellations in low and areostationary orbits for surface-wide coverage, which enables connectivity for rovers, habitats, and scientific instruments.• Laser-based optical communication relies on Earth, which is capable of providing high-bandwidth alternatives to traditional radio frequency (RF) systems.• Surface mesh networks use solar-powered relay nodes for intra-base connectivity.In addition, emerging direct-to-device space Internet systems (e.g., Starlink v2 and AST SpaceMobile) are being considered for deployment in Martian orbit. The systems could help not only to facilitate communication between the settlers and the robotic systems, but also to establish a decentralized edge-computing environment, which becomes necessary to support autonomy during Earth Mars communication blackouts or emergency situations.8. Artificial Intelligence as Terraforming's Silent ArchitectArtificial Intelligence (AI) has the potential to become a key tool in supporting and controlling terraforming, particularly during the initial phases when it is easiest to power the process with the use of automation. Even now, by the year 2025, AI-based systems are already being tested for autonomous navigation, habitat surveillance, robotic factories, and closed-loop life support.On Mars, AI is essential toRobotic swarm coordination: Drones and rovers equipped with AI autonomously construct infrastructure—habitats, greenhouses, and power arrays—without continuous human oversight.Environmental monitoring: Machine learning models can analyze the climate, atmospheric chemistry, radiation levels, and biosignatures to adaptively steer terraforming strategies.Synthetic biology optimization: The design, build, and test process of microbial genomes to support survivability and performance under Martian conditions could be sped up by the use of AI tools to simulate these scenarios.Predictive failure management: With AI, it is possible to predict factors such as equipment wearing, environmental violations, or power changes that may compromise the safety of the crew and system operability.Moreover, AI can work with terraforming simulations across the planetary scale by processing tens of terabytes of satellite and ground sensor data to model atmospheric changes, heat distribution, and biosphere feedback in real-time. To the level of increased similarity between Mars and Earth, more AI will serve as the central nervous system of an artificial biosystem, in which the needs of people will be balanced with the stability of the environment.Closing Thoughts:Science Fiction, Not Science FantasyTerraforming Mars remains in the domain of scientific imagination — not impossible, but not currently achievable with today's engineering. However, foundational technologies are emerging rapidly, often in the form of climate resilience, artificial intelligence, powerful communication, synthetic biology, and autonomous space systems. Far from fantasy, terraforming is becoming a long-term scientific objective, with a realistic path beginning with ISRU, paraterraforming, and biotechnological innovation. As we master the art of engineering extra-terrestrial habitats, we may also learn better how to preserve and regenerate the only home we have right now: Earth.