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Future settlers on Mars would need houses, but they must either spend huge sums transporting construction materials from Earth or use enormous amounts of energy to melt Martian soil into bricks. Scientists in Hong Kong say they have developed a quick and low-cost “living” building material made from genetically engineered yeast, gelatin and sand that can be 3D printed under conditions simulating the Martian environment. Their study, published online last month in Chem Circularity, an...
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