Humans living on Mars is a fascinating concept. We already have Mars One looking to establish a Mars colony, and NASA planning manned missions to the Red Planet, with one objective being to assess the feasibility of living there; whether Mars has the resources necessary for human survival, and whether we have the technology to create what we need.

While, however, it's still a distant dream, that hasn't stopped people from thinking about how we might live if we get there. Recently, NASA and Makerbot held the Mars Base challenge: to design human habitation, using materials either found on Mars or brought from Earth, that could be 3D printed.

With 228 submissions on Thingiverse, the competition was fierce -- but the three top designs are in, with the first place winner receiving a MakerBot Replicator Desktop 3D printer and spools of MakerBot PLA filament going to second and third.