Re: 4D Rubik's Cube
The "4D" cube was just a bunch of 3D cubes stuck together. If there is another dimension, it's not a direction... all of the visible directions are components of existing dimensions. Any dimension past the third would be intangible, such as time. Since time is included in many calculations, and is just as important as matter for any condition, time could easily be named the 4th dimension.
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