Overview
- The study, which published Thursday, Sept. 10, 2026, reports that wet 3D‑printed mixes hardened inside Mars‑like cold, low‑pressure chambers as water froze and sublimated into a lightweight porous solid.
- Printed prototypes about 45 mm tall and 30 mm wide reached compressive strengths of roughly 10–12 megapascals, a range comparable to low‑grade concrete.
- The recipe combines local sand or regolith simulant with gelatin binder and genetically engineered yeast coated in mussel‑inspired adhesive proteins, and the material is extruded as a slurry then freeze‑dried by the environment.
- Authors say the method could use far less energy than melting or sintering rock and might allow recycling by recovering yeast, but the team has not shown that the engineered cells can survive real Martian radiation or atmosphere.
- Scaling to habitable structures remains uncertain because prototypes are tiny and researchers estimate initial on‑site construction would still need hundreds of tons of Earth‑supplied ingredients and further tests on radiation tolerance, bioreactor recycling, and logistics.