[nkrecscu] Cube in dodecahedron

Create a wireframe model of a cube sharing some of the vertices of a regular dodecahedron.  It's one of those things which are hard to believe until you see it, how the pentagon-ness of the dodecahedron can mesh with the square-ness of the cube.  Inspired by a 3D printed regular dodecahedron.

Others: octahedron in icosahedron, tetrahedron in cube, tetrahedron in dodecahedron.  Joining the midpoints of the edges of a tetrahedron forms an octahedron.