2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4380A survey is made of the present observational status on cosmological parameters from microwave background anisotropies. I then move to some non-standard aspect of parameter extraction like quintessence, extra-background of relativistic particles and variations in fundamental constants.15 pages, 5 figures, Invited contribution to the 4th Heidelberg International Conference on Dark Matter in Astro- and Particle Physics, Cape Town, South Africa (February 2002. Eds. H. Klapdor-Kleingrothaus and R. Viollier)AstrophysicsHigh Energy Physics - Phenomenologytext