" A Platonic solid is a convex, regular polyhedron in three-dimensional Euclidean space, consisting of the tetrahedron, cube, octahedron, dodecahedron, and icosahedron. Each face is the same as a regular polygon and has the same number of faces meeting at each vertex. These solids were studied by the ancient Greeks and are believed to represent the five elements - earth, air, fire, water, and the universe. Euclid proved that there are exactly five regular polyhedra, and Johannes Kepler used them to explain the geometry of the universe in his first model of the cosmos. " Our first understanding of geometry via applicable mathematics. Sound design by ORGNLPLN