2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111265We discuss the solution to the Dark Matter problem provided by the lightest neutralino of the Minimal Supersymmetric Standard Model (MSSM) and highlight the role of the International Linear Collider (ILC) in determining its cosmological relic density.8 pages, 2 psfigures, Talk presented at PHOTON2005, Warsaw, 31/08-04/09High Energy Physics - Phenomenologytext