We can inscribe a cube in dodecahedron (see this), where $12$ faces of dodecahedron give the $12$ edges of the cube.

Can we inscribe cube in icosahedron?
We can inscribe a cube in dodecahedron (see this), where $12$ faces of dodecahedron give the $12$ edges of the cube.

Can we inscribe cube in icosahedron?
Dodecahedron and icosahedron are dual to one another. So there would be a way where each vertex of the icosahedron corresponds to an edge of the cube. So you'd have corners of the cube in the centers of some of the faces.


Pictures created using a Cinderella Application created by J. Richter-Gebert.