It's past my bedtime, but I can't resist a thread on dimensions. There has been a HUGE amount of speculation about higher dimensions. You could fill a good size library with studies on dimensional spaces.

Thinking of the fourth dimension as time isn't too difficult. Think about an intersection of two streets. Cars can travel through the intersection using some time to do so. Each car that passes through takes up the same space (in X, Y, and Z directions). What keeps the cars from crashing is the time dimension - they occupy the same X-Y-Z space, but not at the same time coordinate.

If there was an overpass, then multiple cars can occupy the same X-Y space, at the same time, but they are separated in the Z dimension. (Assuming that Z is up-down relative to the surface of earth).

The fourth dimension doesn't have to be time. Maybe T is the first, and X, Y, and Z are 2, 3, and 4.

I have skimmed through several theories about dimensions in the universe. Some postulate seven is the magic number. Some say 11. Some say 12. Some say several hundred. Adding one more dimension to X, Y, Z, and T gets over my head, so I'll have to save additional comments for later. Lack of sleep and medium quantities of alcohol seem to help in understanding higher dimensional spaces. [

]

------------------------

No words of wisdom here.