Future space travelers will have to get creative to build structures on the surface of Mars. Sending all the necessary construction materials across over 140 million miles of outer space wouldn't just be a gargantuan undertaking, it could be prohibitively expensive as well. Instead, scientists have long proposed to make use of the existing Martian soil to construct permanent structures. In a paper accepted for publication in the journal Acta Astronautica, a team of researchers from Kharazmi University in Tehran, Iran, investigated eleven different types of Martian concrete or cement "based on available resources and technologies." And one of […]