The tesseract is a mathematical concept (I will add a link to a more detailed page). It was used in L'Engle's book, which is how most people become acquanted with it. [[User:Boomcoach|Boomcoach]] 14:22, 6 December 2007 (EST) | The tesseract is a mathematical concept (I will add a link to a more detailed page). It was used in L'Engle's book, which is how most people become acquanted with it. [[User:Boomcoach|Boomcoach]] 14:22, 6 December 2007 (EST) |