A team of Illinois-based scientists have developed a form of “Martian concrete” that could be used to build architectural structures on the surface of the Mars. The most important feature of the material is that it construction material that combines Martian soil with molten sulphur and – unlike regular concrete – it is produced without water, which is in scarce supply on Mars. The majority of water that exists on the planet today is frozen. Another advantage of the material is that it it entirely recyclable, so it could be melted down and reset into a new form. It also has a natural resistance to acid and salt, and can endure very low temperatures. (source).