Bio-Integrated Design for Martian Habitats

In 2021, the MELiSSA Pilot Plant at the Universitat Autònoma de Barcelona achieved a landmark breakthrough: an 18-month continuous, fully automated operation connecting the nitrification unit, the microalgae compartment, and an animal isolator containing a "crew" of 40 rats (equivalent to the oxygen consumption of one human). The system demonstrated robust, dynamic stability in balancing oxygen generation, CO₂ consumption, and water recycling ^{3, PApifyQfm4DqZJWgdBUJy8I9H}ANm1rKJDm8RfoLzOCCckgD-PMW8JhHje7wPpMxXAEO-aNimyTQwxgkZ9v8WHvJOcmFUo_W" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">melissafoundation.org">28, ieec.cat">33].

Achieving a 100% mass balance remains highly challenging due to non-degradable fractions like lignin, which currently limit overall biomass conversion to approximately 70% ^35]. However, MELiSSA proves that deterministic, engineering-grade control over a multi-species microbial ecosystem is feasible for long-duration spaceflight.

[3] 2 Atmosphere Revitalization and Microbial Biofilters [source]

In traditional ECLSS, trace contaminant control and CO₂ scrubbing rely on activated charcoal, catalytic oxidizers, and lithium hydroxide beds ^27]. In a bio-integrated habitat, atmosphere revitalization is offloaded to photobioreactors integrated into the architectural walls.

Algal architectures—systems embedding microalgae like Chlorella vulgaris into hydrogel scaffolds or fluidic facades—serve as living air filters. They actively mitigate CO₂, generate oxygen, and can simultaneously filter volatile organic compounds (VOCs) through microbial symbiosis ^{5, kzFzjEiFROVILtuUdyB0MjffJD-3XiWo5r-NotdU7q5Ne1P9iCLwN971-v9Ax5hwd5N1bs7HwDMnHg" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nih.gov">32]}. Furthermore, visual exposure to these green, living walls provides critical psychological benefits for the crew, mitigating the sensory deprivation associated with deep space travel ^6].

[4] Advanced Horticulture and Food Production [source]

High present and future launch costs dictate that biological food production is an absolute requirement for Martian settlement ^4]. While microalgae provide excellent protein and essential fatty acids, higher plants are required for a balanced diet and psychological well-being. However, Mars regolith is poor in bioavailable nutrients, lacks organic matter, and contains toxic perchlorates, making traditional soil-based agriculture highly problematic without extensive chemical remediation ^{8, Nli3RgHnVq-bjEin3Zf7bK26BykEDb93MBucEo3o8VaXKjlXpvZvQwNw646pA==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">botanywithparul.com">36]}.

[4] 1 Transitioning from Particulate Media to Soilless Systems [source]

Early space agriculture experiments, such as NASA's Veggie and Advanced Plant Habitat (APH) aboard the ISS, relied on particulate-media-based delivery (e.g., clay-like argillite in "plant pillows" and porous ceramic tubes) ^{37, uvyjDk00ZUPW4tSdaDgZICSoAroG18b8rXcxlexCtXgBrCXQDQWz31hmHNKhSlkeiA250V89LXILd1ObIYsPvLgntpDZapG9WI14VwRlyhLzhoAx03BpV5UPbkDJelTYEqB3efIPj0SG72WL3tG5HL8GU1NC-dqfbmASF18sQ==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">wikifarmer.com">38]}. While successful for small-scale botanical research, particulate media systems do not scale well. The APH requires roughly 4 kg of consumable media per experiment, representing an unsustainable mass penalty for large-volume crop production ^38].

Consequently, Martian agricultural modules must transition entirely to hydroponics (water-based nutrient delivery) and aeroponics (mist-based nutrient delivery). These soilless systems eliminate the need for heavy soil substrates, offer precise electronic control over nutrient delivery, and dramatically reduce water usage by operating as closed loops ^{36, NNR737OMcOOJGo1E2ArpkTvC3MyYJkZXaanrH4nwlbvnV1h0cMelVGJoIZJZqQ3RnfkjlJy4jIQdr7RplWHq4MUCxYahXHEb3So2vnkxW2AszXCma1xkRvP27vx8XBT0TEGZ3066gXwKkgpNrcEZdA==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">marssociety.ca">39]}. Furthermore, aeroponic systems allow for vertical farming architectures, maximizing crop yield per cubic meter of pressurized habitat volume ^39].

[4] 2 XROOTS, Aeroponics, and Hydroponics in Microgravity/Partial Gravity [source]

The physics of fluid dynamics in microgravity and Martian partial gravity (38% of Earth's) complicate water delivery to plant roots; without Earth-normal gravity, water tends to pool and suffocate roots due to a lack of oxygen ^38].

To solve this, NASA and Sierra Space developed the eXposed Root On-Orbit Test System (XROOTS), which has been successfully deployed on the ISS. XROOTS explores nutrient delivery via aeroponics and hydroponics without any solid growth media ^{38, HZvQQYt-TUIxVBSuPOOb7DUsrRUzXV3FC68BH1vv1YuMhT1vRwYF5leszNaoQa-izbbbCfJwGtfsuvzBRpxbntAjNGtqM33IZcD9YDmA426ovO0SRfqdQZYJbEQp9rrXEcO6mGRcPdfNeL1SetBmBJJHofrb7pWoj6WpbV6faM-ysgxc5s218CPmdxF0nJ1L-wg=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">40, v3JhuLsII0wVu4JgZ8dOeyAoSDqaDygDLHAWh3Ocid2HgaLvXVirr2TVIPErNlozILDqPalFl2dgZE2IFrzFv4yxRNDo89" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">41]}.

In the aeroponic configuration, plant roots are suspended in the air and periodically sprayed with a fine mist. Engineering optimization reveals that the ideal droplet size for aeroponic systems ranges between 30 to 100 μm; this specific size maximizes the absorption effectiveness ratio at the root zone while allowing for optimal oxygenation ^38]. By spending 99.98% of their time in the air and only 0.02% in direct contact with hydro-atomized nutrients, aeroponically grown plants exhibit faster growth rates and higher yields than their soil-bound counterparts ^{36, 2NTCgGvgFS}FRJegn9WoUtkal4Yepb64OytICjZ7SyKEk0VqgX4WTNlbB0IKugFZYU82lzvx77SS0W6hxpWf7W-53rZIaqFSOXg8edtjHDmvdNy9Ts=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">fandom.com">42].

For a crew of four, Sierra Space is developing the "Astro Garden," a large-scale vegetable production system based on these principles ^40]. In a Martian habitat, integrating these advanced horticulture modules directly into the ECLSS ensures that the plants not only provide food but also perform vital transpiration-based water purification and atmospheric scrubbing ^8].

[5] Waste-to-Resource Conversion Mechanisms [source]

To achieve ecological self-sufficiency, the concept of "waste" must be entirely engineered out of the habitat's vocabulary. Every metabolic output from the crew and agricultural modules must become a feedstock for another system, emulating the principles of a circular economy and industrial ecology ^{32, VpDmlfyv_7usjjnEa9tLZLZUjxMq0Ug7CM7lKu7YLK82XlWUb1rdUUasypay3LI0pJEpchxYa4fREj-vUhtoRkum7ip7hsMmGbr4vx4Ss3SNyS5F-daUJyVLkejmJEvAqzDSptAIaXc2mw==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">stgreenpower.co.uk">43]}.

[5] 1 Anaerobic Digestion and Biogas Production [source]

A cornerstone of bio-integrated waste management is the biodigester. Anaerobic digestion is a four-stage biological process (hydrolysis, acidogenesis, acetogenesis, and methanogenesis) that breaks down organic matter—such as human feces, urine, and inedible crop residues (leaves, stalks)—in an oxygen-free environment ^{22, hw2oV9i55KdlALL7AdC5TU26yH1yUb49pjaSw8JWDNvnsZLMYmw5CMgI5SPVa8HdL1CjFc9I8uWOHuvR11dTPejGQWuFHVQwXA5ebdDs2JofV0RkqkZ4YpObhtt" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">44]}.

The primary output of this process is biogas, a mixture of methane and carbon dioxide. On Earth, biogas is flared or used for electricity; on Mars, it is a critical biochemical feedstock. The methane produced from the biodigester can be:

1. Used directly as a propellant fuel (complementing the physicochemical Sabatier reaction) ^44].
2. Fed to methanotrophic bacteria (like C. necator) to biomanufacture PHB bioplastics for 3D printing spare parts and habitat expansions ^22].

Converting human waste into mission-critical methane and construction polymers elegantly solves the sanitation and disposal problem while drastically reducing the need to import petrochemical derivatives from Earth ^{44, fFFvrM3tF2MPCV58BPn1TGzn9sxQgsuG0lvqQ8AYmivoESwFVcG1M41I-a3hG9lTAS-uDdwID3zNhlOfBoLj6mBwskti-8LKMJH6bzAOSaymsy_YfV7WlHIUWvr5A-xvdx1iT32NdyIVjg==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">powerknot.com">45]}.

[5] 2 Nutrient Recycling for Extraterrestrial Agriculture [source]

The secondary output of anaerobic digestion is digestate, a nutrient-rich effluent ^43]. In an open-loop system, nitrogen, phosphorus, and potassium are constantly lost. In a bio-integrated habitat, the digestate from the anaerobic digesters is sterilized (often utilizing the natural 80–100°C temperatures generated by hyperthermophilic aerobic bacteria) to eliminate human pathogens, and then routed directly into the hydroponic and aeroponic agricultural systems ^{32, fFFvrM3tF2MPCV58BPn1TGzn9sxQgsuG0lvqQ8AYmivoESwFVcG1M41I-a3hG9lTAS-uDdwID3zNhlOfBoLj6mBwskti-8LKMJH6bzAOSaymsy_YfV7WlHIUWvr5A-xvdx1iT32NdyIVjg==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">powerknot.com">45]}.

This creates a perfect macro-biological loop: astronauts consume plants; humans excrete waste; microbes digest waste into fertilizer and CO₂; plants consume fertilizer and CO₂ to grow; astronauts consume plants.

[6] Engineering Challenges and the Interplay of Systems [source]

While individual subsystems—biocement, aeroponics, biodigesters—show immense promise, the true engineering challenge lies in their integration. Complex ecological closed-life support systems (ECLSS) have historically suffered from instability. Large-scale terrestrial analogs like Biosphere 2 experienced severe fluctuations in oxygen and carbon dioxide, demonstrating that sudden, irreversible critical transitions can lead to system collapse ^7].

For a Martian habitat, stability requires robust, AI-driven cybernetic control. The interplay between physicochemical systems and biological systems must be seamlessly managed:

• Data-Driven System Modeling: Designers must utilize generalized models to predict early warning signs of ecosystem collapse, linking the "closure degree" to "trophic network complexity" ^7].
• Sensor Integration: Systems like the Advanced Plant Habitat rely on over 180 sensors to monitor temperature, humidity, light quality, and trace gas concentrations in real time ^{37, g4ttJAL65MIAbUHbFvoyyc8Tuh4rlnVKo4kCDX0UL56ruEVeNKkbPucovmHWc-dLpBxcfZQkR7x-GNEwB1QFIxPIQMlcFVf4Pi0y1f0L6KxwjGPGWZTdKSmlDx6ygh" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">sierraspace.com">46]}. Expanding this sensory network to the entire habitat—measuring ureolysis rates in the walls, methane pressure in the biodigesters, and nitrate levels in the MELiSSA loop—will require advanced machine learning algorithms. Projects like AI4Mars are already pioneering the use of synthetic virtual environments to simulate and coordinate these life support interactions before deployment ^1].
• Redundancy: Because biological systems can suffer from viral infections or sudden die-offs (e.g., a phage wiping out a critical bacterial reactor ^47]), the habitat architecture must maintain a hybrid approach. Physicochemical emergency backups (such as ISS-style lithium hydroxide canisters or mechanical water filtration) must remain on standby to prevent catastrophic failure if the biological loop crashes ^42].

• Current Status: Projects like XROOTS and MELiSSA Pilot Plant are functioning effectively at sub-scale or in controlled terrestrial/LEO environments ^{33, HZvQQYt-TUIxVBSuPOOb7DUsrRUzXV3FC68BH1vv1}YuMhT1vRwYF5leszNaoQa-izbbbCfJwGtfsuvzBRpxbntAjNGtqM33IZcD9YDmA426ovO0SRfqdQZYJbEQp9rrXEcO6mGRcPdfNeL1SetBmBJJHofrb7pWoj6WpbV6faM-ysgxc5s218CPmdxF0nJ1L-wg=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">40].
• Gaps: Demonstrating continuous stability of integrated biological systems over multi-year periods without human intervention. The transition from small payload experiments to macro-scale habitat infrastructure must occur rapidly.

Medium-Term (5-10 Years): Synthetic Biology and ISRU Pilot Plants

• Current Status: Synthetic biology has proven the theoretical yields for space-based pharmaceutical production (e.g., engineered Synechocystis producing acetaminophen) and bioplastics (PHB) ^{24, researchgate.net">25]}.
• Gaps: Testing these pathways using actual Martian regolith simulants under Martian gravity and radiation conditions. We lack empirical insight into the genomic and transcriptomic stress responses of multi-species co-cultures (like S. pasteurii and Chroococcidiopsis) operating simultaneously under Mars-analog conditions ^17]. Gene expression behavior in extreme extraterrestrial environments remains largely uncharacterized.

Long-Term (10-20 Years): Autonomous Bio-Construction

• Current Status: Autonomous robotic deployment and 3D printing of structural materials have been proven on Earth (e.g., ICON's 3D-printed homes) ^1].
• Gaps: Developing robots capable of mixing biological feedstock, harvesting regolith, and managing the bio-extrusion of myco-materials or biocement in a low-pressure, high-radiation environment before human arrival ^{15, o5OmPzLv6Rv9cVZe2eqH3HFHBhwBcKXG6XkcCNc71T8t7qYCalp3uZ1A83jDhR8JS81egLlc7J4TrEeiEnn1CqysPx59uRNLZ2gF1HtOCgjlapdeHnQd2vi9dfcsBbwSFec57PCZceoels1KzenqvWUwN8ofaKWzQSlqyVlYhMHy1OKPggMLTM8RU71iINjIMalysbdaX92L3A9Etmi0DfZ3rw==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">frontiersin.org">48]}. As space agencies plan crewed mission architectures for the late 2030s and 2040s, bio-based construction strategies must mature in parallel ^9].

[8] Conclusion [source]

Bio-integrated design provides the only mathematically and logistically viable framework for permanent human settlement on Mars. By pivoting away from inert, imported materials toward living, regenerative systems, aerospace engineering can solve the intractable mass constraints of deep-space logistics.

From the macro-structural deployment of myco-architectural radiation shields and biocemented Martian concrete to the micro-metabolic recycling of air, water, and waste via the MELiSSA loop and anaerobic digesters, the habitat of the future will function as a programmable, synthetic organism. For senior design leaders, the mandate is clear: the focus must rapidly shift from isolated biological experimentation to full-scale systems integration, leveraging synthetic biology, AI-driven environmental control, and closed-loop resource management. Embracing this bio-integrated paradigm will not only enable humanity to thrive on Mars but will inevitably yield transformative, sustainable technologies for mitigating ecological challenges on Earth.

References

[1] Agna Capital. (2025). "Newsletter August 2025." Agna Capital. ^{1] WXGa2cfCCe7q7RszRZk8NMQ5l6ba-IyiCM-R-aAfxv-HKEr0oHkJqaDxIXuSSrW2x1H91kxrBA-yRKn1kKo-2tSq7WYtbBgrATgLPWIdtCaHJ7fcNGzbomdz3de9a2ecsGRMm61bcwLF1v3YHFRyZ0b6bIs86-z7GUhwUYvBHc80TCnvQjuhCONqkDmctqHRF8ePns9A1w8qa5IsxNbsJOv6LXSfrExN1x4cFycGhptpA8ov4oxf73YIQ" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">medium.com">2}: Joseph, S. (2025). "Beyond Smart Cities: How fungi could create the first truly living, self-healing metropolis." Medium. ^{2] Est2ADWTMJIjJoX5P03a83GMqGCpfaOIvkHaFLJi50JHpGWOUM2iWNukAeTL0RI7ii93vWovugjWQ38ZEezSCECQAJD7gs09KSvHNp8WP5CrgLr3-JMoFDA==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">eurekalert.org">3}: Shergill, R. (2023). "Bioregenerative algal architectures." University College London / ResearchGate. ^{5] F7SVj3E29Y3sTP6tMPrmRU0Kxn1RBLCsk4DR42yJ48CDXKS6qwv74XgwXaHJZ2iUOlnnKMaL0qli6FTfDC3Qqf2ujDvzIS9vCfYJqfiJDXPjwdDFH-3lvBzR8aEkiMXNwegEGr7M-CqAs8ZUk8rs2lShjWuNdsGW8pLXwa6c=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nss.org">4}: European Space Agency (ESA). (2009). "MELiSSA Pilot Plant inaugurated today." EurekAlert! ^{3] XbmsAg3xXrLiAaVBJ8WTcOftN14ezh6JgjV-gE9WgKqNQT3xiSzYXGGTehmBGLGMOm1}FGAdXeif4zqKwAMqImMGQ==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">researchgate.net">5: Institut d'Estudis Espacials de Catalunya (IEEC). (2021). "The Spanish astronaut Pedro Duque visits the MELiSSA Pilot Plant." IEEC. ^{33] 4JfPPMEWhs2EIHsuITL6OtaQyKfBLuGsTdXN91yp9VPNO25kAojhdNYEdDLSlwl3DvxjYq2hCt1lS36mcq27pwRB6uI0QwbbhgfRE}yQDeK9E7jANSAefGFAddYczFjbbijpjuq3z4A6MFIoOX5RtQWndDL1dQ==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">researchgate.net">6: MELiSSA Foundation. (2021). "The Astronaut Pedro Duque has visited today the MELiSSA Pilot Plant." MELiSSA Foundation News. ^{28] jKYJPUWDwlynG7yQ3FwpStknGK70htJyzydsM3Qp8TULfCyHobH7512LsyiEHauaR-w3Mks2IVZiPZul4Js=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">und.edu">7}: European Space Agency (ESA). (2024). "From waste to resource: ESA funds circular economy innovations for space." ESA Discovery and Preparation. ^{35] ebchBQLtim1evwEfBPlpuNvvL4mTe1Y8BuwN7vy9UyRyjBa4m5rkEweiD6xm374Biqj1UQlY-m68ZqlSivzb4eLCzXbMflQ4AsDYMkFCeOP92WQPuhL9tpHHPnBBPSc8eGsXZJd-2kdZugrMsgq2B0chGtRdf9M2SGjGxECcSGW4-JyQpmUoZXy-8aepnQ==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">researchgate.net">8}: Healey, B. (2016). "Part 3: White Mars." ESA Concordia Blog. ^{31] 7Im6vGC-7Qduh8-wjt9M-i97qEXdzSClAngBEt9OZ2rv-zUKgQdb7GKR2K4zRvIsdGmQ92mzyLzyFnMLYKIvxNne3nt6j5QoJyCo=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">marsdaily.com">9}: University of North Dakota. (2018). "Experiments with Ecological Closed Life Support Systems (ECLSS)." UND Theses. ^{7] HEBmycgc9gTHNxapKUC5PfCZ9tgm9w9ksZP0ZrmOUaSoJnQhv5Z}S1jeFt8Xz2xjK9vkPkdPZNfrpeWPOLpzjSoCjCWeEHw9oJikZIxv8h1M0kXVUvIlP3xZGctiljkagX2oSabLCozj7fb4ESsQfkGFIHzMMKJwxRLjQzQMq0Mr-pHse90JhfcR2vYX5kXwAnoWtY0Gw8iHpCsj7owGWjOMhkivCUHeYaqAT57KGUrPDp6-FgtZHDZ3nnuPq3XqpMYqfZcfr-bZHRWrc8Y1slPK9ISxyVk94lY4I2hyvKugZYScWWq-Thhx-ZaEbNr1NXZljLL7ukDqHle1SFCH-12SrEw==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">cambridge.org">10: ResearchGate. (2025). "Overview of Environmental Control and Life Support Systems in Human Space Missions." ResearchGate. ^{6] researchgate.net">11}: PubMed. (2001). "Mars mission life support systems." National Center for Biotechnology Information. ^{34] f8ijFUZI43QkFTCbAYf3WujZExYeMQi82yet8qVst5Rlyi8fug52mSmLbo0WtCTsgM3J57XeZ1}ihMR5rWNwFisiXvLeHHN7LAto6E=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">biorxiv.org">12: National Space Society. (2011). "Towards Closed ECLSS for Space Habitats Part I." NSS Journal. ^{4] dV}y6ctuA4IEhBYt0kXTiVhyre2KPD2jxVpCoZNXj2HHw7rngZCJZlGg1GJAldxhaBA0xr1RzgwvkGEMl7waYfW9cg-YHGzLKrD68Q0tdOsUx95SFz7OjZkX-RsFDxxg442LiRoiEBMoGhPU2Dpzw==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">mycostories.com">13: NASA. (2025). "Environmental Control and Life Support Systems (ECLSS)." NASA Reference. ^{27] UiGfLcdW8o4PxIGmiEwxYMhbGcmNmIi7iyQ2vFEjVPtSG1fxuPopDULwmZrIkM8q1zp-rxFa78SD8=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">aljazeera.com">14}: ResearchGate. (2016). "Bio-Regenerative Life Support System Development for Lunar/Mars Habitats." ResearchGate. ^{8] kdfudKH2f19LqM4m12MCMlMaFS71Kjdr1TyaNXpKFJFhvahtRJjgpBj1QQNFStrQhJmTIEs3FiJkACxw3Zq4Mx4EdYhU5tSVbDrX6uhMzVfc5AlX0UWrhOzC9MtQ==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">hayadan.com">15}: ASGSR. (2023). "Decadal Survey: Synthetic Biology." American Society for Gravitational and Space Research. ^{47] LpWC4BACoTc9tkY-comDRvQCT82AznvBYwJ09Y3SnkWRgPVLQJqvPNip2Lg2UNKSpYeNGvfHmQPlOHCuh2GI2MGUtDqgoLbg==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">azobuild.com">16}: Menezes, A. A., et al. (2015). "Towards synthetic biological approaches to resource utilization on space missions." Journal of the Royal Society Interface / PMC. ^{24] EobQ9cGyCmg7-rGM8-nQ10bfC2EmGCPdnnijlKPtitCgdWX8ubJ-FwTbRYAQzHECWgtIwbYbygrxeJpFFg=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">frontiersin.org">17}: Cambridge University Press. (2024). "Biofutures for Transplanetary Habitats: A summary and key outcomes." Research Directions: Biotechnology Design. ^{10] 5XKkhiwNoqM1dBMKkqzOGzZDYsfC1uGGN3apLjKXhPPsjBYeaYU78m8b0KAhjnlB0-fmlvDTFP3b3vmojolI0PvabhiUKUUsMzQEtYivQ01OBx0abqXDza6yrs" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">scimex.org">18}: Botany with Parul. (2025). "Growing Plants on Mars: What We’ve Learned From Space Agriculture Experiments." Botany with Parul. ^{36] f1II0}CXAGe1MFQimGqpdxzcQIt6xbU4i1FJP0vFGjlVakUQ0uspA==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">sciencedaily.com">19: The Mars Society. (2020). "Growing food on Mars: ISRU Part 4." Mars Society Canada. ^{39] 94uiKAzB2btL3qNi}HsG3kx2QPV5vxsAZPlvNT3RczFdn6IYh7MwsxBE8iKKsvLZRH-zk-XNh4Rg5E-tr0AyjtJWHFT0kVx1gdFysOl19kviXQxWEZXN6R0PRBxIzbXTDaxaIFGCZUgXkD20gz86ZZG25Cf6jZHWuVkX1ZMpEq" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">spacedaily.com">20: NASA. (2022). "A Novel Approach to Growing Gardens in Space." NASA Science. ^{40] zuPMGFBMVFRNQ5vD34x026MsC-cvQuhtZhi1W3dkAnihHgHRj8l7n1ECgsHPl3rgnxECGWDw86ql0S05MkhAP15tJaSs1OuVsYjwUyECSvl6W-FhrRB0eUOKGAHT-IR-KozJNTJwIrfwWWLnADPTUPx2fTyd05La5mUDa-j" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">plos.org">21}: NASA. (2025). "Space Crops." NASA Biological & Physical Sciences. ^{49] qUJ0iks-bDUSARlBSdpXbajoZHGT7cedLWvGXpHkmXJhsyOjOkQm4Uk3p0E8O5z2HXWjojgBQWazMxK3Wy-7OTSrNSYGKJ5gV05mXb6E1pNTGN2gR-vOT0dX7DnWDvvbKaoNTYVDNXr6vhDHH30frx2" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">tdl.org">22}: NASA Fandom. "Aeroponics." NASA Wiki. ^{42] -b8z8CQkDpT49C90pwUOhqdQJ--tf1xfzHIek4O1N9ms0MwxCHzvsWPtrVkG5BofCA59UTYIgMvl22CNkq1GX0TgUsDtGhutUm-eP078qiMNqiZkk2FsneMX46MVZOaONnvVDVQMes6pMtTVfh2H-eI1JE-Yo=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">science.gov">23}: Hayadan. (2025). "Bacterial bioconcrete for Mars construction." Hayadan Science. ^{15] wsixnwenW}EYToDSXU7KE8pa22Jz5JOu4fetqqXv4TG-pq9rZRwlJsj-2qPIifXyz8GW" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nih.gov">24: Scimex. (2025). "The bacteria that could cement our chances of building human colonies on Mars." Scimex Newsfeed. ^{18] zm4isfkXxL-KNrQHrBFY1bhFvRjnUzpb8TWywFe2NXswR5fQdK5hUWhzlxG4zz4GcCxRKhAyOjKiu6C575W6-PvaMXgeqJ3PeqK8q4Kv" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">researchgate.net">25}: AZoBuild. (2025). "Turning Soil Into Shelter: The Role of Biomineralization." AZoBuild News. ^{16] rTkhmXKBS8EJtfVFbSBVO0tsNS9qDg2177DLXQfOmLWtkoYyVHPsAliMW4xjWtF63xc64aZIjA17P" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">mdpi.com">26}: Space Daily. (2026). "Martian toxin found to toughen microbe built bricks." Space Daily. ^{20] tozBiISxO8r6yZ182VKoHR}to1TxuHv6NYoyh7FazQdsdLPKm5TXgL2IxyxOAAi5QB6WDY8e-E59VrDl548jGqxT0E8oIfBhhwPtnwts4qGIbVRdJGwUPGEgPGTOmxoej2SyWGwWHJgBRK158YOrhBjjVcdr6FnFZavrmyJ9F65asxQ=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">27: PLOS ONE. (2026). "Effect of perchlorate on lab-isolated biocementation capable bacteria." PLOS ONE. ^{21] PApifyQfm4DqZJWgdBUJy8I9HANm1rKJDm8RfoLzOCCckgD-PMW8JhHje7wPpMxXAEO-aNimyTQwxgkZ9v8WHvJOcmFUoW" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">melissafoundation.org">28}: Power Knot. (2024). "How Biodigesters Could Sustain Life on Other Planets." Power Knot Blog. ^{45] PGlg2vSNgiIcbU3Zfa56rZXptYhHkqSG6hfcMecHlhl1ajPrCn3UAttTdxvdO-5GNiCurbkvhTIuLg30njDGNwrU6yP33qcqNzR-FX6EY8TuUnhBYQ8mJwOMZCWuIOwIt8qzyQRNqlUTHVgTA0wY4ZXePB4sZz8ACRSDD9x1w2cqEPFAM-IVIAZc1AhT-LURt3OQWCwWME3m1TuVVmZF8TFYdqMLR3yJ41kSm8u6FHBNxl" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">uab.cat">29}: NASA Technical Reports Server. (2016). "Biodigester Feasibility & Design for Space & Earth Project." NTRS. ^{44] PKy04QY9pBWPkt4jxYRWAt3bOb8juvw90rqXZITA0JnK8NJvm56DoO2ZPX4Qab6Mnxzt2WbeXqvXGtSlErU6PxQXpgIHir7-g82d-6C2N-ufyx9HJ-ixbFrUPQqxBIHNeR0I598HFB3hJ7l-CrAirI=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">diva-portal.org">30}: Texas Tech University. "Anaerobic Digestion in Space." TTU Institutional Repository. ^{22] MSLWUCPBkVnFCE-FnYK2D-zmhBllKg9jmfMZNjst2r9at20NSr2O2qeJys8y00KMb4ZNetm9ClkPjiLLtJZTKCfUqUUh6B9FutWFdCPTdXMHV30G3zmErPoPJjAbweweFn63WSeEBWA" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">esa.int">31}: ST Green Power. (2023). "Closing the loop: transforming organic waste through anaerobic digestion." ST Green Power Insight. ^{43] kzFzjEiFROVILtuUdyB0MjffJD-3XiWo5r-NotdU7q5Ne1P9iCLwN971-v9Ax5hwd5N1bs7HwDMnHg" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nih.gov">32}: PMC. (2021). "Bioregenerative methods for space applications." National Center for Biotechnology Information. ^{32] ieec.cat">33}: MDPI. (2017). "Synthetic Biology of PHA Producers." Bioengineering. ^{26] nih.gov">34}: Science.gov. "Bacterium Cupriavidus necator." Science.gov. ^{23] esa.int">35}: Frontiers in Microbiology. (2025). "Bacteria turning Mars regolith into 3D printable building material." Frontiers News. ^{17, o5OmPzLv6Rv9cVZe2eqH3HFHBhwBcKXG6XkcCNc71T8t7qYCalp3uZ1A83jDhR8JS81egLlc7J4TrEeiEnn1CqysPx59uRNLZ2gF1HtOCgjlapdeHnQd2vi9dfcsBbwSFec57PCZceoels1KzenqvWUwN8ofaKWzQSlqyVlYhMHy1OKPggMLTM8RU71iINjIMalysbdaX92L3A9Etmi0DfZ3rw==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">frontiersin.org">48] Nli3RgHnVq-bjEin3Zf7bK26BykEDb93MBucEo3o8VaXKjlXpvZvQwNw646pA==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">botanywithparul.com">36}: Mars Daily. (2025). "Bacterial partnership offers pathway to produce Mars regolith bricks for future habitats." Mars Daily. ^{9] 8yUtnuzREXJ6WjtVSjf0H2AJ6M822w96JM16M60WxrpHfmBeWX0vZ57Ib6qe4Bjr2l6SF5odA2d9aIVuWxjhpDw-GSBGGQUSElH198g3irGFtzgzYd4nw=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">sciencefriday.com">37}: ScienceDaily. (2026). "Bacteria partnership for Mars biocementation." ScienceDaily. ^{19] uvyjDk00ZUPW4tSdaDgZICSoAroG18b8rXcxlexCtXgBrCXQDQWz31hmHNKhSlkeiA250V89LXILd1ObIYsPvLgntpDZapG9WI14VwRlyhLzhoAx03BpV5UPbkDJelTYEqB3efIPj0SG72WL3tG5HL8GU1NC-dqfbmASF18sQ==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">wikifarmer.com">38}: NASA. (2023). "XROOTS: eXposed Root On-Orbit Test System." NASA Biological & Physical Sciences. ^{41] NNR737OMcOOJGo1E2ArpkTvC3MyYJkZXaanrH4nwlbvnV1h0cMelVGJoIZJZqQ3RnfkjlJy4jIQdr7RplWHq4MUCxYahXHEb3So2vnkxW2AszXCma1xkRvP27vx8XBT0TEGZ3066gXwKkgpNrcEZdA==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">marssociety.ca">39}: Science Friday. (2025). "Crops Combat Hunger." Science Friday Educational Resources. ^{37] HZvQQYt-TUIxVBSuPOOb7DUsrRUzXV3FC68BH1vv1YuMhT1vRwYF5leszNaoQa-izbbbCfJwGtfsuvzBRpxbntAjNGtqM33IZcD9YDmA426ovO0SRfqdQZYJbEQp9rrXEcO6mGRcPdfNeL1SetBmBJJHofrb7pWoj6WpbV6faM-ysgxc5s218CPmdxF0nJ1L-wg=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">40}: Wikifarmer. (2025). "Space Hydroponics: What are the hurdles for plant growth in zero-gravity settings?" Wikifarmer Library. ^{38] v3JhuLsII0wVu4JgZ8dOeyAoSDqaDygDLHAWh3Ocid2HgaLvXVirr2TVIPErNlozILDqPalFl2dgZE2IFrzFv4yxRNDo89" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">41}: Sierra Space. "Microgravity Environmental Systems: Space Station Payloads." Sierra Space. ^{46] 2NTCgGvgFSFRJegn9WoUtkal4Yepb64OytICjZ7SyKEk0VqgX4WTNlbB0IKugFZYU82lzvx77SS0W6hxpWf7W-53rZIaqFSOXg8edtjHDmvdNy9Ts=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">fandom.com">42}: Al Jazeera. (2024). "Growing mushroom houses on the moon: NASA’s fungus-filled plan." Al Jazeera Features. ^{14] VpDmlfyv}7usjjnEa9tLZLZUjxMq0Ug7CM7lKu7YLK82XlWUb1rdUUasypay3LI0pJEpchxYa4fREj-vUhtoRkum7ip7hsMmGbr4vx4Ss3SNyS5F-daUJyVLkejmJEvAqzDSptAIaXc2mw==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">stgreenpower.co.uk">43: MycoStories. (2024). "Fungi for Space Exploration: NASA's Mycotecture Project Advances to Phase 3." MycoStories. ^{13] hw2oV9i55KdlALL7AdC5TU2}6yH1yUb49pjaSw8JWDNvnsZLMYmw5CMgI5SPVa8HdL1CjFc9I8uWOHuvR11dTPejGQWuFHVQwXA5ebdDs2JofV0RkqkZ4YpObhtt" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">nasa.gov">44: ResearchGate. "Radiation protection and structural stability of fungal melanin polylactic acid biocomposites in low Earth orbit." ResearchGate. ^{11] fFFvrM3tF2MPCV58BPn1TGzn9sxQgsuG0lvqQ8AYmivoESwFVcG1M41I-a3hG9lTAS-uDdwID3zNhlOfBoLj6mBwskti-8LKMJH6bzAOSaymsyYfV7WlHIUWvr5A-xvdx1iT32NdyIVjg==" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">powerknot.com">45}: bioRxiv. (2020). "Radiation shielding capacity of Cladosporium sphaerospermum." bioRxiv. ^{12] g4}ttJAL65MIAbUHbFvoyyc8Tuh4rlnVKo4kCDX0UL56ruEVeNKkbPucovmHWc-dLpBxcfZQkR7x-GNEwB1QFIxPIQMlcFVf4Pi0y1f0L6KxwjGPGWZTdKSmlDx6ygh" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">sierraspace.com">46: Universitat Autònoma de Barcelona (UAB). (2021). "Spanish astronaut Pedro Duque visits the MELiSSA Pilot Plant." UAB Newsroom. ^{29] 0M}W9nr3F8kKH8a46O5MMK7abDC9Nsynj5k3So2rCniNxnOyOtbjCi0GH2WlwNGKguLPByLt7VDkROLGYzK5jFkk=" class="text-muted hover:text-primary border-b border-dotted border-grid-line" target="_blank" rel="noopener">asgsr.org">47: DiVA Portal. (2020). "MELiSSA Life Support System Modeling." DiVA Archive. ^30] [source]