Is the universe a lattice?
23359
Does the Planck scale imply that spacetime is discrete?
136613
Does TG prove that ZFC2 has a model?
75058
Why isn't an infinite, flat, nonexpanding universe filled with a uniform matter distribution a solution to Einstein's equation?
56103
Is the universe finite or infinite?
35463
How come the universe is made of matter and not antimatter?
103920
Supersymmetry vs multiverse
37587
What has been proved about the big bang, and what has not?
24445
How can an infinite universe expand?
50584
Parallel universes: are there an infinite amount of universes?
4276
Did the Big Bang happen at a point?
75788
Is spacetime absolute?
115190
Why is physical space equivalent to $\mathbb{R}^3$?
2377
Is the total energy of the universe zero?
153550
Is there any connection between distributive lattices and planar graphs?
84229
Why the galaxies form 2D planes (or spiral-like) instead of 3D balls (or spherical-like)?
112264
Cosmological constant doubts
79734
Is every sub-lattice of $\mathcal P(X)$ isomorphic to a sub-lattice of $\mathcal P(X')$ containing singleton sets?