This dodecahedron unfolds and expands.

This dodecahedron unfolds and expands.
In geometry, a dodecahedron  is any polyhedron with twelve flat faces, but usually a regular dodecahedron is meant: a Platonic solid. It is composed of 12 regular pentagonal faces, with three meeting at each vertex, and is represented by the Schläfli symbol {5,3}. It has 20 vertices, 30 edges and 160 diagonals. Its dual polyhedron is the icosahedron, with Schläfli symbol {3,5}.

References:
http://en.wikipedia.org/wiki/Dodecahedron
http://mathworld.wolfram.com/Dodecahedron.html
Animation by Paul Nylander