Scientists develop living yeast cement for Mars 3D printing

Researchers have developed a biological “living cement” that could enable the 3D printing of structures on Mars using local regolith and Earth-based biological ingredients. The experimental mixture combines Martian soil with gelatin and genetically engineered yeast, specifically a strain of Saccharomyces cerevisiae.

The yeast has been engineered to produce highly adhesive proteins, similar to those used by mussels to cling to rocks, which act as a biological binder. Gelatin provides a hydrogel structure for the components, while the soil provides mass. When extruded through a 3D printer, the material utilizes Mars’ extreme cold and low atmospheric pressure to undergo a freeze-drying process. This sublimation leaves behind a lightweight, porous network.

In simulated Martian conditions, the resulting material demonstrated a compressive strength of 12 MPa and flexural strength of 6 MPa, making it comparable to low-grade, lightweight concrete. This technology could significantly reduce the need to transport heavy construction materials from Earth, as missions would only need to carry biological starter materials and printing equipment. Additionally, the material is recyclable and can be broken down and reused for new construction.