[CubicleGuy]

. They propose surprising universe models in which space, spherical yet much smaller than the observable universe, generates an optical illusion on a cosmic scale (topological lens effet).

Why bother creating a massively huge universe when a small one with perfectly-aligned mirrors at each end will do?

[Lazamataz]

Why bother creating a massively huge universe when a small one with perfectly-aligned mirrors at each end will do?

Existence: G-d's Fun House Mirror.