2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43078The recent high-quality measurements of the Cosmic Microwave Background anisotropies have presented cosmologists with the possibility of studying the large scale properties of our universe with unprecedented precision. Here I review the current status of observations and constraints on theoretical models.15 Pages, 2 Figures, To appear in the Proceedings of the Euresco Conference, 'What comes beyond the Standard Model', 12. - 17. July 2003 PortorozHigh Energy Physics - Phenomenologytext