Zero G: Not An Option

If we're ever going to truly strike out into the cosmos, we're going to have to overcome a simple problem: humans need gravity. And until some super big brains somehow develop artificial gravity, some other super big brains need to build a vessel like this, with a spinning axis to make sure we don't get muscle atrophy and can properly play ping pong. Builder El Barto has some inspiration here, go big brains go!