2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34411A simple model of spacetime foam, made by spherically symmetric wormholes, with or without a cosmological term is proposed. The black hole area quantization and its consequences are examined in this context. We open the possibility of probing Lorentz symmetry in this picture.LaTeX2e file, 5 pages. Talk given at the Spanish Relativity Meeting (ERE 2002), Mao, Menorca, Spain, 22-24 September 2002General Relativity and Quantum CosmologyHigh Energy Physics - Theorytext