Modular #MakerBorMars Base

The pressurized core base is built around a set of modules, fully standardized and identical (largely because I only found out about this competition two days ago...or there would be some variety).

Each of the main pressurized modules, shaped like squashed spheres, is suitable for human use. The entrances can be sealed to contain pressure leaks. There are multiple paths between any two modules, so that if a path is blocked or another module fails catastrophically, none of the remaining modu