Are we living in a Universe with 3 time dimensions and 1 spatial dimension?
44085
Intuition for multiple temporal dimensions
75803
Why does the space of pure qudit states have dimension $2(D-1)$, rather than $D^2-2$?
72416
The universe appears to have a lower bound in the time dimension, why not an upper bound?
136281
Is the universe expanding, or is everything in it getting smaller?
19499
Why is cross product only defined in 3 and 7 dimensions?
67531
Universe being flat and why we can't see or access the space "behind" our universe plane?
131128
Why time is considered a dimension?
25827
Does time expand with space? (or contract)
43888
Age of universe?
52827
Could negative dimension ever make sense?
10553
Does the universe have an edge/boundary/barrier? If yes, what is at the edge?
148726
Are we living in a false vacuum? Is there any way to tell?
113249
Does time exist in a vacuum?
95681
If the universe is 3D, how is space-time like a "fabric"?
124631
Why are we not able to visualize Dimensions beyond 3 (or maximum 4 including time)?
40380
Center of mass in n dimension, possible?
54395
Is Poincare recurrence relevant to our universe?