Mars astronauts could live in houses made of yeast and jello, say scientists

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The team instead turned to bioengineered yeast and gelatin mixed with simulated Mars dirt to 3D print structures. "My inspiration came from freeze-dried fruits that become harder,” senior author Jishen Qiu, an associate professor at The Hong Kong University of Science and Technology, told Cell Press, the publisher of the paper. Add plain old Martian dirt, and extrude the material through a 3D-printing nozzle. Either way, avoiding the need to heat Martian dirt could reduce the energy and heavy equipment required to build structures there.

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