[Thomas An.]

Intriguing !
Imagine a 4th dimensional object casting a shadow in 3 dimensions ... somehow it's a mind bending thought.

Here is agent "Smith's" explanation.
(Carl Sagan was very articulate. A great mind)
http://www.youtube.com/watch?v=zwV-ig-UIeg
http://en.wikipedia.org/wiki/Tesseract

[Bubbaloo]

One of these days I want to render a hypercube, unfolded of course...
Maybe somehow, the virtual world can be used as a tool to explore the 4th dimension?