120 cell

This short computer graphics animation presents the regular 120cell: a four dimensional polytope composed of 120 dodecahedra and also known as the hyperdodecahedron or hecatonicosachoron. The figure is built up through a sequence of subsequent foldings: 5 segments form a pentagon, 12 pentagons form a dodecahedron and eventually 120 dodecahedra form the 3D shadow of a 120cell. The animation is included in Mathfilm 2008 DVD. See also and The animation has been generated with POVRay