[kschults]

What exactly is the 4th spacial dimension? Since we only experience space in three dimensions, how can we assign meaning to a fourth dimension in space?

[secret]

These may help visualize 4D space:

http://en.wikipedia.org/wiki/Fourth_dimension

http://www.instructables.com/id/How_to_draw_a_4_dimension_cu...

[rms]

The classic Flatland also helps. http://www.geom.uiuc.edu/~banchoff/Flatland/

[anigbrowl]

http://www.superliminal.com/cube/cube.htm