Steffen's polyhedron

Steffen's polyhedron is a specific type of convex polyhedron that serves as a counterexample in geometric topology. It is notable for having a relatively simple construction but demonstrating interesting properties related to triangulations and face structures. More specifically, Steffen's polyhedron has the following key characteristics: 1. **Vertex Count**: It has 8 vertices. 2. **Edge Count**: It contains 24 edges.