Paul Steinhardt of Princeton University has proposed a "Ekpyrotic Model" of the Universe that describes our current universe as arising from a collision of two three-dimensional worlds (branes) in a space with an extra (fourth) spatial dimension. The prop
Frontispiece to Charles Howard Hinton’s The Fourth Dimension a book all about the “tesseract” – a four-dimensional analog of the cube, the tesseract being to the cube as the cube is to the square. Hinton, a British mathematician and science fictio
Understanding Space and Time: There Is No “Fourth” Dimension Just because there are four dimensions doesn’t mean there’s a “fourth dimension.” It may sound confusing, but this is vitally important in relation to understanding how space and time work.