Is it plausible for spacetime to be shaped something like a torus?
14329
What is known about the topological structure of spacetime?
15799
Experimental evidence of a fourth spatial dimension?
95763
Elastic modulii of spacetime
107712
Can general relativity be explained by equations describing a fabric of space embedded in a flat 5-dimensional Minkowski space?
66193
How to prove that a flat spacetime admits Minkowski coordinates?
40380
Center of mass in n dimension, possible?
126008
What is the general procedure for constructing the Penrose diagram for an arbitrary $(1+1)d$ spacetime?
144274
Why mass & energy bend spacetime?
9634
Is there Geometric Interpretation of Spinors?
111371
What really is Spacetime?
119639
Do photons bend spacetime or not?
156382
Why is Compactification restricted to Toroids, Calabi-Yau et al?
121904
Regarding the possibility of Closed Timelike Curves
1553
How is gravity proportional to space-time curvature in the rubber-sheet analogy?
10874
Map points on a square onto a Torus
117326
Why energy curves spacetime?
38714
Can a metric in General Relativity, Supergravity, String Theory, etc., be asymmetric?