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Scientists find a way to make concrete on Mars

Mars explorers could use the rocks around them to build shelter.
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If humans are ever going to have a long-term presence on Mars, they'll need to make their own buildings -- they can't count on timely shipments from Earth. But how do they do that when the resources they have will share little in common with what they knew back home? Northwestern University researchers have an idea. They've developed a concrete that uses Mars' native materials. You only have to heat sulphur until it melts, mix it with an equal part of Martian soil and let it cool. The finished concrete is very strong, easy to work with and recyclable -- you just have to reheat it to get some building supplies back.

Any need for Martian concrete is years away at best, but the discovery is still crucial. It suggests that explorers won't have much trouble transitioning from short-term shelters to more permanent structures. Also, any would-be settlers can afford to pack light. Rather than carry every possible building they might want, they could bring just the essentials and build more once they're established on the Red Planet's surface.

[Image credit: Getty Images]

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