Fourth Dimension

In geometry, the tesseract, also called 8-cell or octachoron, is the four-dimensional equivalent of a cube, where motion along the fourth dimension is often a representation for bounded transformations of the cube through time. The tesseract is to the cube as the cube is to the square; or, more formally, the tesseract can be described as a regular convex 4-polytope whose boundary consists of eight cubical cells.


Shown here is an 8-cell and whether you understand all this or not, see this Wikipedia page to admit it's an amazing animation.