Finalists from NASA’s 3D-printed Mars home challenge are out of this world
It’s expensive to ship things through space, so when the first space colonists reach the moon or Mars, they will want to carry as little cargo as possible. That poses a challenge: If they need to limit the amount of resources they bring, what will colonists use to build their shelters? One idea is to live innetworks of lava tubes, which would protect them from the extreme conditions found at the surface....