| − | '''Tesseract'''-The Fourth dimensional cube; the tesseract is a [[cube]] suspended in another cube with all the vertices or corners connected. The tesseract was used in [[Madelaine L'Engel]]'s [[A Wrinkle In Time]] as "a wrinkle in time" the internal cube flows outward as the external one flows inward square by square. | + | '''Tesseract''' is a four-dimensional cube. In three-dimensional space, it is depicted as a [[cube]] suspended within another cube with all the vertices or corners connected. The tesseract was used in [[Madelaine L'Engel]]'s [[A Wrinkle In Time]] as "a wrinkle in time" the internal cube flows outward as the external one flows inward square by square. |