Movies depict Mars as a harsh yet conquerable world; reality suggests otherwise. Human survival on the Red Planet is feasible—but only within highly engineered, continuously maintained habitats, supported by substantial energy reserves, resources, and backup systems.
Is Survival on Mars Possible?
Short answer: yes—technically speaking. The practical answer is no, if “living” implies the familiar existence on Earth’s open surface. Mars’s atmosphere is only about 1% as dense as Earth’s, composed of 95-96% carbon dioxide; the average temperature hovers around -62°C, plunging to lows of -87°C at night. Without a spacesuit or a sealed habitat, one would perish in minutes from asphyxiation, decompression, and freezing.
Why Surface Settlement is Improbable
The notion of “building homes on the surface and living as we do on Earth” is common in fiction, but in reality, the Martian surface requires protection from radiation and constant internal pressure maintenance. To make Mars’s atmosphere breathable, it would need to be intensified roughly 200-fold, achieving about 50% of Earth’s pressure—scientists estimate this is either impossible or would take hundreds to thousands of years. Surface supplies of CO2 and vapor are insufficient to naturally generate a warm, dense aerial blanket.
The practical approach resembles that of a “submarine” or a “station within lava tubes”: shelters buried under regolith or located in natural tunnels would offer shielding from galactic cosmic rays and solar flares, simultaneously helping to maintain acceptable pressure and temperature.
Dangers of Martian Air and Cold
Mars’s atmosphere is not only thin but also poisonous to humans—it’s nearly pure CO2. Even if oxygen is extracted locally (a capability already demonstrated experimentally by the MOXIE instrument on the Perseverance rover), scaling this system for a settlement demands immense energy inputs and redundant backups. Heat loss is enormous: maintaining a comfortable internal temperature and warming up external systems constitutes a constant drain on the power supply. A single failure in heating or air generation threatens catastrophe.
Impact of Low Gravity on the Human Body
Martian gravity is approximately 38% of Earth’s. This might seem beneficial at first—easier movement and load carrying. However, long-term habitation in reduced gravity leads to the deterioration of bone mass and muscle. Orbital observations show bone density loss of about 1-1.5% per month; while systematic exercise can counteract this, eliminating the effects entirely without artificial gravity remains beyond our current means. Furthermore, we do not know how a child’s body will develop in 0.38g, nor whether such individuals could later adapt to life on Earth.
Can Food Be Grown on Mars?
The idea of planting potatoes in Martian soil is straight out of “The Martian.” In reality, the regolith is saturated with perchlorates—salts toxic to humans and plants, commonly used in rocket fuel and pyrotechnics. Before the soil can be made viable, it must be detoxified; alternatives involve hydroponics and aeroponics within closed bioreactors. Such farms would resemble laboratories, requiring precise control over water, nutrients, microbiota, and energy.
Psychology, Logistics, and Mission Duration
Under a typical mission profile, a round trip to Mars consumes a minimum of 2-3 years, factoring in launch windows and long transit times. Communication delays ranging from a few to about 22 minutes one-way prevent Martian inhabitants from receiving immediate assistance or engaging in real-time dialogue with Earth. The phenomenon of “Earth-out-of-view,” environmental monotony, and a limited sensory input (the same smells, colors, textures) pose risks to mental health. NASA is experimenting with “veggie pods” and other methods on the ISS, but interplanetary isolation remains a unique challenge.
“It’s easy to envision a permanent research station where astronauts work for two years. But would people actually want to live there long-term? Personally, I doubt it. You’ll never step outside without a suit, and due to radiation, you’ll most likely be living underground. It sounds adventurous, but I suspect once people get there, they’ll want to return home.”
Dr. Jeffrey Bennett, Astrophysicist, Big Kid Science
Prospects for Martian Colonization
Technology is advancing—rocket launches are becoming cheaper, large interplanetary vehicle designs (like Starship) are progressing, and MOXIE confirmed the feasibility of in-situ oxygen extraction. However, the gap between “delivering people” and “sustaining life for generations” is vast. Currently, realistic programs focus on scientific outposts with crew rotations and autonomous robotic systems, rather than large-scale settlements.
The open question remains: what will take precedence—the ambition and commercial ventures capable of pushing forward the first permanent bases, or sound calculations that will keep Mars a zone for short-term missions and robotics until we discover cheap energy solutions, effective soil detoxification methods, and ways to create artificial gravity?
About the Author
