2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/10862Observational results from several experiments such as COBE, SP, Saskatoon, PYTHON, ARGO, MAX, MSAM, Tenerife and CAT are considered and a comparison is made with predictions from several models. Conclusions are reached about the viability of current structure formation models.7 pages LaTeX, including 6 PostScript figures. To appear in proceedings of the XXXIst Rencontre de Moriond, `Microwave Background Anisotropies'Astrophysicstext