Mars astronauts could live in houses made of yeast and jello, say scientists
Low-energy 3D printing could turn Martian dirt into sturdy structures
Scientists from Hong Kong Universities suggest that future Martian astronauts could construct their living quarters using a composite of yeast, gelatin, and simulated Martian soil. The researchers, led by Jishen Qiu, an associate professor at The Hong Kong University of Science and Technology, describe a process of using a bioengineered yeast to produce adhesive proteins that bind the components and mix it with artificial gelatin to create a growth medium.
This mixture is then combined with Martian dirt and extruded through a 3D-printing nozzle to form a foam-like substance. When exposed to the dry, cold Martian atmosphere, the ice within this substance would sublimate, leaving behind a lightweight, porous yet strong material. The resulting material boasts compressive and flexural strengths comparable to low-grade terrestrial concrete, consuming significantly less energy than the heating methods typically used for processing Martian dirt.
The team also notes the potential for the yeast-gelatin structure to be recycled, provided at least one yeast cell survives the harsh conditions. Though the current version of the structure is only about 2 inches tall, Qiu believes the technology could be scaled up. However, further testing would be needed to ensure the material can retain pressure, maintain gas tightness, provide thermal regulation, radiation shielding, and dust protection.
Ultimately, the researchers believe this yeast-based building method could help reduce the energy and heavy equipment requirements for constructing Martian habitats, making space exploration more feasible.
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