The fourth dimension had been depicted by mathematicians and philosophers (Monge, Hachette, Hinton, Lissitzky, Poincare, Descartes etc.)as being out of our conceptual reach, but attempts to convey this were still made. However, now, with new tools at our disposal ("VR", internet, www, 3D modelling software) it should become easier to explain the perceived experience of the fourth dimension. In May 94 in Alberta, Canada there was, apparently "the first immersive experience of phenomena involving a fourth spatial dimension" Does anyone else know about this?