We all know the snub cube and snub dodecahedron, and might be wondering if there might be any higher polytopes that use them. Well, as of yesterday, Mecejide on the Polytope Discord has found a 5D nonconvex uniform polytope with snub cube cells (and snub cube prism facets).
The object is a blend of 10 square/snub cube duoprisms, blended in such a way so that their tesseract facets blend out. It has chiral penteractic symmetry and is, as far as I know, the first uniform polytope to use snub cube elements. In fact it's probably one of the first snub cube-containing objects in classes we've studied, since AFAIK no CRF has been found which uses snub cubes other than the obvious prism.
There also appear to be similar objects in higher dimensions. A 6D blend of snub cubic duoprisms has already been verified to exist.