According to string theory, spacetime as we know it isn't 4dimensional, but 10dimensional. The next question is, where are the extra 6 dimensions that we don't see? One answer is that they're 'compactified': roughly speaking, rolled up into such a small shape that they're unobservable by humans. CalabiYau spaces may be that submicroscopic shape. There are many such spaces, but being 6dimensional, they're not easy to draw! This model is a 3D crosssection through a likely space. Surprisingly it's beautiful — a wildly selfintersecting ride.
Too small? Mega CalabiYau Manifold is here. CalabiYau Manifold, 80mm glass cube – $72
 
