J.A. Wheeler has in the 1950s investigated topological constructs called geons, which are essentially gravitational wave packets held together by their own field energy. I have two questions with regards to this : 1. Is there a consensus yet on whether geons in classical GR ( torsion vanishes everywhere ) are stable or not ? 2. Does anyone know whether it has been investigated whether such geons could exist in a space-time endowed with a connection other than the Levi-Civita connection of GR, e.g. with a Weizenboeck connection, or some other connection "mixing" curvature and torsion ? Is there a possibility they could be stable, then ? I'd just like to know as a matter of personal interest. Thank you in advance.