Tesseract - Wikipedia, the free encyclopedia Posted by tmachinecharmer on Thursday April 14, 2011 @06:06AM from the en.wikipedia.org dept. http://en.wikipedia.org/wiki/Tesseract ( 3 comments | 7 points | on HN )
If you're interested in 4D you might enjoy http://www.superliminal.com/cube/cube.htm (requires Java)