2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194093The main motivations and challenges related with the physics of large-scale magnetic fields are briefly analyzed. The interplay between large-scale magnetic fields and scalar CMB anisotropies is addressed with specific attention on recent progresses.76 pages, 17 figures, To appear in the book "String theory and fundamental interactions" (published in celebration of the 65th birthday of Gabriele Veneziano), eds. M. Gasperini and J. Maharana (Lecture Notes in Physics, Springer Berlin/Heidelberg, 2007), www.springerlink.com/content/1616-6361AstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - PhenomenologyHigh Energy Physics - Theorytext