Not as difficult name as the last one, some of you might actually have known what is was before you clicked it.
The dodecahedron is, as the name already explains (for those that know ancient Greek, or had platonic solids in maths class) any shape consisting of 12 (dodeca) faces (hedron). This case is special because they are all 12 regular pentagons. There are only 5 regular polyhedra that can be constructed by using just one type of regular polygon of which the dodecahedron is in my opinion the most astonishing.

Next step is the a 3D depiction of the 120-cell, which consists of 120 of these dodecahedra, folded in 4D space.
The dodecahedron is, as the name already explains (for those that know ancient Greek, or had platonic solids in maths class) any shape consisting of 12 (dodeca) faces (hedron). This case is special because they are all 12 regular pentagons. There are only 5 regular polyhedra that can be constructed by using just one type of regular polygon of which the dodecahedron is in my opinion the most astonishing.

Next step is the a 3D depiction of the 120-cell, which consists of 120 of these dodecahedra, folded in 4D space.




) which you can make a kind of 3D "shadow" of, similar to how light makes a 2D shadow of a 3D object... only much more complicated... please confirm if this is basically correct, or just me spurting nonsense! 