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Mars One

Mars One was a founded in 2011 by with the ambitious goal of establishing the first permanent human settlement on Mars by sending volunteer astronauts on one-way missions starting in the mid-2020s. The project envisioned a multi-phase approach, beginning with unmanned robotic missions in 2018 to deliver habitats, systems, and supplies, followed by the landing of four crew members in 2024 or later, with additional missions every two years to expand the colony. Funding was to be secured through a combination of private investments, , and revenue from for a global series documenting the selection, training, and journey of the astronauts. Over 200,000 people from more than 140 countries applied to become astronauts by 2013, with the selection process narrowing down to 100 finalists by 2015, though no formal training or contracts were ever implemented. Despite generating significant public interest, Mars One faced widespread criticism for its technical and financial implausibility. An independent analysis by students in 2014 concluded that the proposed systems would fail catastrophically, with oxygen levels becoming lethal within 68 days due to crop growth in shared habitats, and that resupply demands would require far more launches and costs than planned—potentially $4.5 billion for spares alone. experts partially agreed, highlighting low technology readiness for in-situ resource utilization and the unsuitability of International Space Station-derived systems for Mars gravity, while noting overestimations in spare parts mass. The project repeatedly delayed timelines without achieving milestones, leading to its subsidiary Mars One Ventures AG being declared bankrupt by a court on January 15, 2019, with assets under $25,000 and debts exceeding €1 million.

Background and Origin

Founding and Initial Announcement

Mars One was founded in 2011 by entrepreneurs , a former CEO of the wind energy company Ampyx Power, and Arno Wielders, a engineer and co-founder of the Mars Society Netherlands chapter, with the aim of establishing a permanent on Mars. The project originated from Lansdorp's earlier vision in 2010, inspired by discussions on funding large-scale endeavors through media, including ideas from TV producer Paul Römer. The initiative gained public attention with its initial announcement in June 2012, highlighted in media reports detailing the one-way mission concept and funding model. This was followed by the official launch of the Mars One website and a on December 4, 2012, announcing the conversion from a to a not-for-profit under law to facilitate global participation and donations. Early publicity efforts included Lansdorp's TEDxDelft presentation on November 5, 2012, where he outlined the project's feasibility and called for public involvement in astronaut selection. Initial funding for Mars One came primarily from personal investments by the founders, including Lansdorp's own resources from prior ventures, supplemented by small public donations and campaigns that raised modest amounts in the project's early stages. These resources supported preliminary development and , with donations totaling over $200,000 by late through online platforms.

Core Mission Objectives

Mars One's core mission objectives focused on pioneering a permanent, independent on Mars, with colonists committing to one-way journeys and no return to . The project, founded in , envisioned initiating this colonization effort in the to establish as a multi-planetary , thereby ensuring long-term survival and expansion beyond . This vision emphasized transforming Mars into a viable through incremental human presence, drawing on the philosophical drive to extend human civilization to another planet. The mission adopted a phased approach, beginning with robotic precursor missions for site preparation and scouting, followed by the arrival of the first human crew of four in 2023, and subsequent crews of four every two years thereafter. These arrivals were designed to progressively build , with each group contributing to expansion and operational sustainability. The emphasis on one-way travel underscored the commitment to permanence, as return missions were deemed technologically and economically unfeasible at the time. Central to the objectives was achieving self-sufficiency through in-situ resource utilization (ISRU), including extracting water from Martian ice for and , and harnessing for power. growth would rely on local food production, such as cultivating crops like potatoes and in controlled habitats, to reduce dependence on supplies over time. International collaboration formed a cornerstone, with the project soliciting global participation to promote unity across cultures and nations in pursuit of shared exploration goals. Inspirational elements permeated the mission, aiming to advance scientific knowledge of Mars—potentially including evidence of past life—and to unite humanity in a collective endeavor that demonstrates cooperative problem-solving on an interplanetary scale. By framing the settlement as a demonstration of diverse teams training and executing challenging missions together, Mars One sought to ignite global excitement for and the multi-planetary future.

Organizational Structure

Leadership and Team Composition

Mars One was founded in 2011 by and co-founder Arno Wielders, with Lansdorp, a mechanical engineer, serving as its CEO. Lansdorp holds a in from the and conducted PhD research in wind energy at before abandoning it to co-found Ampyx Power, a startup developing systems. Under his leadership, Mars One aimed to establish a permanent on Mars through a combination of nonprofit mission management and for-profit media ventures. The core leadership team included co-founder Arno Wielders as Chief Technical Officer, responsible for engineering aspects of the mission architecture. Norbert Kraft, a with experience in space medicine from programs in the , , and , was appointed Medical to oversee health and selection criteria. Suzanne Flinkenflögel handled communications as , managing public outreach and media relations. This small initial group of four key members formed the foundation's executive structure in its early years. The team began as the two founders and remained small, with a core staff of around four key members including specialized roles in and communications, maintaining a lean operation focused on and . By , the organization continued with a small team emphasizing expertise over scale to advance development. Organizationally, Mars One operated as a Dutch not-for-profit , Stichting Mars One, which managed implementation, astronaut selection, and hardware ownership, complemented by the for-profit Mars One Ventures for commercial activities like . The structure supported an international presence, with team members based in the and the , and later associations in through Ventures' operations.

Advisers and Collaborations

Mars One engaged a team of external advisers from scientific, , and psychological fields to provide expertise on feasibility, selection, and ethical considerations. James R. Kass, , a veteran of operations with over 30 years of experience including roles in and missions, served as an adviser focused on crew selection and training protocols. His sister, Raye Kass, , a psychology professor at specializing in group dynamics and , contributed to the interdisciplinary advisory team, emphasizing psychological preparation and interpersonal ethics for long-duration isolation. Other notable advisers included Mason A. Peck, an associate professor of at , who offered unpaid technical guidance on spacecraft systems, and Chris , a planetary scientist at , who advised on and life support challenges. The project also formed key collaborations with aerospace firms to advance preliminary designs. In March 2013, Mars One contracted Space Development Corporation to conduct a study for environmental control and systems, as well as concepts tailored for Mars surface operations. This partnership aimed to leverage Paragon's expertise in extreme environment technologies, marking one of the initiative's first technical engagements. Similarly, in December 2013, Mars One selected to develop the lander for its planned 2018 unmanned precursor mission, focusing on entry, descent, and landing technologies proven in prior Mars projects. These collaborations provided conceptual inputs but did not extend to full development or funding commitments from the partners.

Mission Architecture

Robotic Precursor Missions

Mars One planned a series of robotic precursor missions to demonstrate key technologies and prepare the Martian surface for eventual , beginning with the unmanned Red Planet One lander. Announced in December 2013, this mission was intended as the first private robotic effort to reach Mars, focusing on validating entry, descent, and landing (EDL) systems, power generation, and communication essential for future crewed operations. The Red Planet One lander, originally targeted for launch in 2016 but rescheduled to , was designed to carry a suite of experiments selected through public solicitation to test utilization and surface operations. Primary objectives included deploying thin-film panels to assess power production in Martian conditions, analyzing samples for water ice extraction to support systems, and establishing a communication relay via an accompanying orbiter for high-bandwidth data transmission back to . These efforts aimed to scout potential sites by evaluating availability and environmental hazards, laying groundwork for deployment without human risk. To develop the mission, Mars One secured contracts with established aerospace firms, including for the lander design—adapted from NASA's 2007 Phoenix Mars Lander architecture—and Ltd. (SSTL) for the communications orbiter to enable real-time imaging and data relay. Student-designed payloads were also incorporated to foster global engagement, with proposals emphasizing low-mass, high-impact experiments for resource scouting and technology validation. Subsequent updates outlined additional precursors, such as a rover to further and resource mapping, but funding shortfalls led to repeated . By March 2015, work on the robotic missions was suspended indefinitely due to insufficient , pushing the overall back and ultimately preventing any launches. Despite these setbacks, the precursor concepts influenced discussions on private-sector contributions to Mars exploration, highlighting challenges in financing ambitious unmanned ventures.

Human Settlement Timeline

Mars One's planned human settlement timeline envisioned a series of one-way missions to build a permanent on the Red Planet, starting with robotic precursors to prepare the site. The first crewed mission was initially targeted for but delayed to , carrying four colonists who would land to assemble inflatable habitats and living modules delivered by prior cargo missions. Subsequent crews of four were scheduled to follow every 26 months, aligning with -Mars launch windows, with arrivals in 2027, 2029, 2031, and continuing thereafter to expand the . These missions would focus on expansion, resource utilization, and agricultural setup to support growing numbers. The interval of 26 months reflects the synodic period between and Mars, allowing efficient propulsion and trajectory planning using existing chemical rocket technology. The initial four colonists would prioritize constructing a basic settlement, including power systems and , with the colony projected to reach over 20 inhabitants by 2033 through cumulative crew arrivals. This phase aimed to achieve self-sufficiency in food production and water recycling, laying the foundation for larger-scale operations. Long-term plans called for continuous immigration to transform the into a thriving , with contingencies for delays due to technological maturation, such as advancements in shielding and reliability, as well as securing sufficient through partnerships and rights. These projections were subject to revisions; by , Mars One pushed the first human landing to 2031 amid challenges in mission architecture and financial hurdles, though the project ultimately filed for in without executing any missions.

Technology Roadmap

Launch and Propulsion Systems

Mars One's mission architecture relied on the as the primary to deliver cargo and habitat modules to for assembly prior to interplanetary transfer. This heavy-lift rocket, capable of placing up to 53 metric tons into in its reusable configuration, was selected for its cost-effectiveness and payload capacity suitable for the project's modular approach to settlement construction. The 's design, featuring three reusable first-stage cores powered by engines using and , aligned with Mars One's emphasis on leveraging existing commercial technology to minimize development risks and expenses. The propulsion system for the Mars transfer phase was based on conventional chemical propulsion, utilizing hypergolic or bipropellant engines to perform the trans-Mars injection burn from . This approach facilitated a , the most energy-efficient trajectory for interplanetary travel between and Mars, which exploits the alignment of the planets every 26 months during launch windows. The resulting one-way transit duration was estimated at 6 to 9 months, providing sufficient time for crew acclimation while minimizing propellant requirements compared to higher-energy trajectories. Launch costs were projected at approximately $80 to $125 million per mission, based on SpaceX's pricing announced in and factoring in the specialized payloads for Mars transit. The partial reusability of the —recovering the side boosters and potentially the central core—was anticipated to lower marginal costs for follow-on launches, enabling the economically challenging cadence of multiple missions every synodic period. These estimates underscored the project's dependence on commercial launch affordability to achieve the overall mission budget of around $6 billion for initial crew deployment.

Transit and Landing Vehicles

The Mars Transit Vehicle (MTV) formed the core of Mars One's architecture for crewed interplanetary travel, designed to carry four astronauts from to Mars orbit over a journey lasting approximately six months. The vehicle integrated a dedicated transit habitat with a descent lander, assembled in orbit via multiple launches, including four missions to deliver the components. This configuration aimed to provide a self-contained for the crew, emphasizing modularity and reliance on technologies where possible. Central to the MTV was the transit habitat, comprising six modified SpaceX Dragon modules—three for living quarters, two for life support, and one for supplies—supplemented by two inflatable habitat units each offering 500 cubic meters of volume. The inflatable modules, with a low areal density of 9.16 kg/m³ and a 15:1 packaging ratio, were intended to expand upon deployment, creating additional space for crew activities, exercise, and recreation during the long-duration transit. Radiation shielding was incorporated into the habitat design through layered materials in the inflatable structures and Dragon modules to mitigate exposure to galactic cosmic rays and solar particle events, though specific shielding thicknesses were not publicly detailed beyond general reliance on vehicle mass distribution. Life support systems drew from International Space Station-derived environmental control and life support (ECLSS) technologies, including water recycling, air revitalization, and waste management, augmented by a biomass production system with 50 square meters of crop growth area per living module to supplement food supplies and generate oxygen. The Mars lander, integrated with the for the final phase of the mission, was envisioned as a scaled-up variant of the capsule to accommodate the four-person crew. With a total mass of 14,400 kg and a delivery capacity of 2,500 kg to the surface, the lander featured a pressurized descent module for crew protection during . Entry, descent, and landing (EDL) relied on propulsive retro-rockets for powered descent, building on demonstrated technologies from missions like NASA's lander, which used parachutes and terminal thrusters for soft touchdown. While Mars One's plans emphasized propulsive braking to handle the vehicle's mass, conceptual integrations of cushioning or sky crane-style deployment were considered in early explorations to ensure precise landing within a targeted 20 km by 20 km ellipse, though no full-scale prototypes were developed. Power for the lander during EDL and initial surface interface came from onboard batteries, with post-landing transition to deployable thin-film solar arrays for sustained operations. To validate EDL technologies, Mars One outlined precursor robotic missions, including a 2018 demonstration lander derived from the Phoenix probe architecture to test entry profiles, descent propulsion, and landing sensors in the Martian environment. Earth-based simulations in 2015, part of broader technology maturation studies, focused on modeling EDL trajectories and propulsion performance using high-fidelity software tools, though these remained conceptual without physical hardware tests. Overall power systems for the MTV emphasized lightweight thin-film solar arrays, such as those from MiaSole with 15.5% efficiency and 2.7 kg/m² areal density, paired with lithium-ion batteries for energy storage during the transit phase and eclipse periods; these were sized to meet baseline crew needs of approximately 10-15 kW continuous, scaling up for lander operations. Launch integration with the propulsion stages occurred in Earth orbit, ensuring the MTV's assembly prior to trans-Mars injection.

Surface Operations Equipment

The Mars One envisioned the lander functioning as an initial upon arrival on the Martian surface, serving as the foundation for subsequent expansion. Precursor robotic missions would deliver and assemble the first units, with the lander integrating ISRU capabilities to extract water from for into oxygen and , supporting and potential production. Rovers would transport samples to an onboard oven in the unit for processing, though the low technology readiness level of these ISRU systems raised concerns about reliability and scalability in the 's . The was conceptualized as a pressurized, flexible garment to enable in the low-gravity, dusty Martian , supporting up to 8-hour EVAs for surface tasks. This design aimed to balance mass efficiency with functionality for thermal protection, durability, heat management during extended operations, and dust mitigation to prevent abrasion and contamination, drawing from existing (EMU) technologies while addressing Mars-specific challenges like variable temperatures and particulates. Habitat modules formed the core of surface , comprising prefabricated units launched in sets of six per increment—two for living quarters, two for , and two for cargo—to create an expandable connected via airlocks and utility corridors. Each living unit provided approximately 50 m² of personal per , with integrated systems for environmental control, , and crop growth in separate chambers to maintain oxygen balance. Plans included augmenting these modules with 3D-printed structures using in-situ and binders, leveraging robotic to reduce Earth-launched mass and enhance long-term sustainability, though feasibility analyses highlighted risks in shielding and structural integrity. Rover systems were integral for surface , preparation, and gathering, with surveyor-class vehicles tasked to scout landing zones, map resources, and deliver to ISRU facilities. These autonomous or remotely operated platforms would support construction and scientific surveys, operating in the Martian to extend human reach beyond fixed bases. options under consideration included advanced solar arrays for daytime operations or radioisotope thermoelectric generators (RTGs) for continuous reliability in dust-prone conditions, aligning with the mission's emphasis on proven technologies.

Astronaut Selection and Preparation

Application and Screening Process

The application process for Mars One astronauts began in April 2013 and concluded on August 31, 2013, during which the organization received 202,586 applications from individuals aged 18 and older across 140 countries. Applicants were required to pay a fee ranging from $5 to $75, depending on their country of residence—for example, $38 for U.S. applicants—to submit their candidacy and deter frivolous entries. Each submission included a 1- to 2-minute video in which candidates introduced themselves and explained their motivation for the one-way mission, with the fee proceeds intended to support mission development. In Round 1, conducted throughout , Mars One's selection board reviewed the video submissions primarily for demonstrated motivation and suitability for permanent Mars residency, reducing the pool to 1,058 candidates from 107 by December 30, 2013. The contributed the largest number of applicants at 297, followed by with 75 and with 62. This initial screening emphasized personal commitment over formal qualifications, as Mars One stated that no specific degree or professional experience was required at this stage, though candidates needed to exhibit intelligence and basic physical and . Round 2, spanning late 2013 to early , involved medical evaluations and interviews of the 1,058 candidates, culminating in the announcement of the "Mars 100" on February 17, 2015—comprising 50 men and 50 women from over 30 countries. This group represented a further narrowing based on preliminary assessments of and interpersonal skills, with the selection process designed to ensure diversity in and . Subsequent rounds were planned but never took place due to the project's financial and organizational challenges. Round 3 was intended for to focus on group challenges for the Mars 100, where candidates would be divided into teams of 10 to 15 for simulated tasks testing collaboration, problem-solving, and survival skills under guidance from Mars One staff. Round 4, planned for 2016, was to involve the remaining approximately 40 candidates in simulations to evaluate psychological endurance in confined environments. Round 5, comprising final suitability interviews, was scheduled for 2017. However, the selection process stalled after the Mars 100 announcement, with no further advancements, crew assignments, or training implemented before the project's in 2019. Throughout the process, key selection criteria included robust physical and to withstand the rigors of space travel and isolation, practical skills such as or knowledge beneficial for operations, and an unwavering commitment to the mission's permanence, as candidates would train for eight years while forgoing return options. Mars One prioritized these attributes to build a self-sustaining , with later rounds planned to incorporate simulations to verify candidates' ability to adapt to Mars-like conditions.

Training and Simulation Protocols

The training program for Mars One astronauts was envisioned as a comprehensive, multi-year regimen to equip selected candidates with the skills necessary for a permanent settlement on Mars, though the project never advanced beyond planning due to financial and technical challenges. Training was planned to begin in after further selection to 24 finalists, spanning approximately seven years and divided into phases that built progressively from individual skill development to full crew simulations. The curriculum emphasized practical abilities for self-sufficiency in an isolated, resource-scarce environment, including such as habitat maintenance and emergency response, operation of robotic systems for and , building through techniques, and performing basic medical procedures like wound care and telemedicine in the absence of Earth-based support. A key adaptation for the one-way mission was the integration of modules addressing the unique psychological and operational demands of no-return travel. Training focused on fostering to mitigate conflicts in confined spaces over indefinite periods, resource management strategies for closed-loop life support systems (e.g., water and air), and coping mechanisms for permanent separation from and , drawing on insights from long-duration space psychology studies. These elements were designed to prepare crews for the emotional toll of , with exercises simulating delayed communications (up to 24 minutes round-trip) and irreversible decisions without options. Simulations formed the backbone of the planned program, progressing from individual tasks to group-based immersive scenarios to replicate Mars conditions. Early phases included zero-gravity flights to train low-gravity mobility and equipment handling, while later stages involved analog missions for isolation testing. Additional simulations encompassed operations, using Earth-based proxies to practice remote vehicle control, navigation, and sample collection under communication lags. Mars One planned to construct dedicated Earth-based outposts in or polar regions to simulate Martian for full-mission rehearsals, allowing crews to test integrated systems like habitat deployment and resource utilization, but none were built or used.

Funding and Revenue Strategies

Media and Broadcasting Plans

Mars One's primary media strategy revolved around transforming the astronaut selection, , and mission into a global phenomenon to generate substantial funding. In June 2014, the organization announced an exclusive partnership with , through its UK-based subsidiary Darlow Smithson Productions, to develop and produce a multi-season series covering the entire process from candidate screening to . The proposed format drew inspiration from the interactive style of , incorporating elements such as continuous camera coverage of training simulations, live video streams from the Mars surface habitat once established, and audience participation through voting on crew assignments and mission decisions to heighten engagement. The series also planned to include educational segments explaining Mars exploration , aiming to inspire while monetizing viewership. Mars One projected that global , , and related sales could yield over $6 billion in revenue, positioning the TV deal as a of the project's financial model comparable to major international events. Despite initial enthusiasm, the 2014 negotiations with producers failed to secure commitments from major , and the partnership dissolved in February 2015 after the parties could not agree on contract specifics, leaving the broadcasting plans unrealized.

Sponsorships, Donations, and Crowdfunding

Mars One secured initial sponsorships from several small companies in 2012 to support early studies for its mission. These included Byte Internet, a webhosting provider; VBC Notarissen, a ; MeetIn, a consulting firm; New-Energy.tv, a web station focused on energy and climate; and Dejan SEO, an Australian company. These agreements marked the project's first influx of external funding beyond founder contributions, aimed at funding preliminary supplier studies estimated at 500 to 2,500 man-hours each. Donations formed a key non-corporate for Mars One, collected primarily through its from public supporters worldwide. By December 2013, donations totaled more than $200,000. This figure grew to approximately $760,000 by February 2015, including proceeds from merchandise sales such as t-shirts and books. By April 2016, cumulative donations reached about $907,000, representing a modest but steady public contribution toward the project's estimated $6 billion overall cost. Crowdfunding efforts supplemented donations, with Mars One launching an in December 2013 to fund its planned 2018 unmanned lander mission. The sought $400,000 but raised approximately $290,000 from over 6,000 backers by its close in February 2014, falling short of the goal but demonstrating grassroots interest. Mars One also maintained ongoing donation drives similar to models on its platform, though these did not yield additional large-scale . Overall, by 2016, combined sponsorships, donations, merchandise, and had generated roughly $1 million in funding.

Financial Decline and Bankruptcy

Revenue Realization Challenges

Mars One's ambitious funding model, which heavily relied on media rights for a reality television series documenting the astronaut selection and mission, encountered significant shortfalls when major broadcasters proved unwilling to commit. A preliminary agreement with production company Endemol, known for shows like Big Brother, was signed in 2014 but terminated by early 2015 amid concerns over the project's feasibility and timeline delays. Without a flagship TV deal, Mars One pivoted to an online streaming format for selection content, but this alternative generated minimal revenue, contributing to the overall tally of less than $1 million from merchandise, donations, and related media efforts. Sponsorship pursuits similarly faltered due to the venture's high-risk profile, including technical uncertainties and the one-way mission's ethical implications, which deterred potential corporate partners. Initial interest from entities like consulting firms provided minor early support, but no substantial deals materialized with giants such as or , despite publicized letters of intent; only limited branding opportunities were secured, yielding negligible financial impact. This hesitancy left a critical gap in the projected sponsorship revenue stream, which was intended to cover a significant portion of operational costs. Crowdfunding efforts, primarily through astronaut application fees of approximately $38 to $40 per entrant, attracted over 200,000 submissions and, according to Mars One, generated around $8 million, though this figure is unverified and likely overstated given reports of far fewer paid video applications. This fell short of expectations and drew backlash for perceived exploitative practices amid growing about the project's viability. Post-selection rounds faced demands for refunds from applicants and critics, further straining limited resources and highlighting the unsustainability of relying on public enthusiasm without proven progress. By , these combined sources had realized far short of the estimated $6 billion required for the first crewed mission, representing less than 1% of the needed funds and underscoring the profound underperformance of Mars One's revenue strategies. In January 2019, Mars One Ventures AG, the for-profit Swiss arm of the Mars One project, was declared bankrupt by the Civil Court of the City of , effective from 3:37 p.m. on , with debts totaling approximately €1 million and assets valued at less than $25,000. This stemmed from ongoing financial struggles, including failed streams from applicant fees and sponsorships, leaving the company unable to meet obligations. The proceedings primarily affected the entity, which held key commercialization rights for broadcasting, merchandise, and related to the project, while the non-profit Mars One was initially reported as unaffected but became operationally dormant. An appeals in the canton of affirmed the status in early February 2019, placing the company into administration and paving the way for potential to settle outstanding debts. Although Mars One had a U.S.-based affiliate for certain operations, no separate U.S. filings were reported, and the core centered on the European entities. No major class-action lawsuits directly tied to the project's closure were documented in public records, though earlier criticisms in 2015 highlighted concerns over the $38 application fees charged to over 200,000 aspiring astronauts, which some viewed as misleading given the project's unfeasibility. Following the bankruptcy, Mars One Ventures' assets, including any remaining intellectual property and funds, were liquidated through Swiss court processes, with creditors receiving minimal recovery due to the low asset value. By mid-2019, the official Mars One website ceased updates—its last post dated July 2018—and the domain became inactive, preserved only through archival services like the . The project's founder, , confirmed the end of operations but expressed no plans for revival, and as of 2025, no credible attempts to resurrect Mars One or transfer its assets to a new entity have emerged. This dissolution marked the permanent termination of the initiative, shifting focus in the space community to more viable public-private Mars exploration efforts.

Criticism and Legacy

Scientific and Technical Critiques

Experts have raised significant concerns about the scientific and technical feasibility of Mars One's proposed mission architecture, highlighting gaps in current technology and unproven assumptions that could jeopardize crew survival. A seminal analysis by researchers at the (MIT) in 2014 evaluated the project's and systems, concluding that the plans relied on immature technologies without adequate redundancy, leading to catastrophic failures shortly after landing. This assessment, presented at the , modeled the settlement using engineering simulations and found that Mars One's design would result in 100% mortality for the initial crew within months due to cascading system breakdowns. Radiation exposure represents a primary technical challenge for Mars One's unshielded transit and surface habitats. During the six-to-nine-month journey to Mars, astronauts would face galactic cosmic rays and solar particle events without sufficient magnetic or material shielding, potentially delivering fatal doses equivalent to hundreds of times annual exposure levels. On the Martian surface, the thin atmosphere and lack of a global exacerbate risks, with daily doses estimated at 0.7 millisieverts—about 100 times the average annual background dose on (2.4 mSv/year)—leading to elevated cancer risks and acute health effects unless habitats are buried under meters of , a Mars One proposed but lacked detailed for. Critics, including planetary Dr. Veronica Bray, noted that such exposure could cause , immune suppression, and long-term genetic damage, with no proven countermeasures ready for deployment by the project's timeline. Life support systems, particularly in-situ resource utilization (ISRU) for water and oxygen production, were deemed unproven at the required scale in Mars One's architecture. The project's reliance on extracting water from Martian regolith and atmosphere for electrolysis and crop irrigation assumes efficiencies not demonstrated in space-analog tests, where current prototypes achieve limited yields due to low resource availability and high energy demands. MIT simulations revealed that excess oxygen from plant growth would accumulate without adequate scrubbing, causing habitat pressure imbalances and nitrogen depletion, suffocating the crew within 68 days of arrival. Furthermore, caloric production deficits were projected, as the proposed 50 square meters of hydroponic farming could supply only a fraction of the 3,040 daily calories needed per person, necessitating 200 square meters minimum and risking starvation amid inefficient ISRU water recycling. Entry, descent, and landing (EDL) risks for Mars One's heavy habitats further undermine feasibility, with NASA's analogs estimating success rates below 50% for payloads exceeding current capabilities. Historical Mars missions have achieved only about a 50% overall success rate, primarily due to EDL failures from atmospheric variability and precision requirements. For Mars One's multi-ton settlement modules, existing and retropropulsion technologies fall short, as the thin Martian atmosphere provides insufficient drag for deceleration, demanding untested supersonic systems that could fail under storms or off-nominal trajectories. The study amplified this by calculating that delivering initial supplies would require 15 launches—far exceeding Mars One's six—highlighting logistical vulnerabilities in the EDL phase.

Ethical, Policy, and Public Concerns

Bioethicists raised significant concerns about the ethical implications of Mars One's proposed one-way missions to Mars, equating them to " missions" due to the high risks and lack of return capability, which could exploit vulnerable applicants seeking purpose or adventure. Critics argued that the project's process failed to meet standard requirements for human subjects, as applicants might not fully comprehend the irreversible nature of the journey or the psychological and physical tolls involved, potentially violating protections akin to those in . Additionally, the absence of detailed protocols for well-being, including support and , prompted questions about whether Mars One adhered to basic ethical standards for human experimentation in extreme environments. Policy critiques from space advocacy organizations highlighted Mars One as a potential distraction from established collaborative efforts in space exploration. For instance, emphasized during public discussions that the project's ambitious claims required more rigorous scrutiny of technical and logistical challenges, potentially diverting attention from sustainable, government-backed initiatives like NASA's Mars exploration programs. Such views positioned Mars One as undermining broader international cooperation on , prioritizing sensational media over evidence-based progress toward . Public backlash intensified with widespread accusations that Mars One operated as a , primarily through charging application fees of up to $75 while providing no tangible progress toward missions. In March , a top finalist, Joseph Roche, publicly withdrew and labeled the organization "dangerously flawed," claiming it misled applicants about selection processes and data usage, fueling perceptions of financial exploitation. Although no formal lawsuits from applicants materialized in , the controversy amplified calls for regulatory oversight of private space ventures to protect consumers from unsubstantiated promises. Even among selected candidates, doubts about the project's viability emerged over time. This internal disillusionment underscored the human cost of the venture's unfulfilled aspirations. Post-bankruptcy in , Mars One has been cited as a cautionary example of hype in private , with no revival as of 2025.

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