2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/215583I informally review the Higgs mechanism, focusing on fundamental aspects which should be common knowledge but apparently are not, explain why your understanding of gauge symmetry breaking is a decreasing function of your reliance on the unitary gauge, and discuss some implications for cosmology (domains, dark energy, CMB cold spot).21 pages, no figures. v2: Fixed typos. v3: Added ref. URLs, minor fixes. v4: Added section, appendix, comments, references, acknowledgmentGeneral PhysicsAstrophysicstext