But one man’s cupcake decorating with mud is another man’s prototyping of 3D-printing on Mars. And 3D-printing could solve the single biggest hurdle to a crewed Mars expedition: the cost of transporting everything humans need to survive on the red planet.
It’s a mass problem. The more mass you have to take, the more expensive it is to escape Earth’s gravity and get to Mars. And some of the heaviest cargo will be material to shelter astronauts from the radiation zipping through Mars’ thin atmosphere. With 3D-printing, you don’t need to bring shelter. You build it out of dirt or ice already on Mars.
NASA is all aboard the 3D-printing train. Last year, it unveiled winners of its first 3D-printed Mars habitat design challenge, and the architectural renders of the winning entries were all sleek and futuristic, as renders of unbuilt buildings always are (see above). In reality, the current state of the art for Martian 3D-printing looks more like the clay logs Metzger has been documenting on Twitter.
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