2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/139913It has been argued that the large-angle cosmic microwave background anisotropy has anomalies at 3-sigma level. We review various proposed ideas to explain the origin of the anomalies and discuss how we can constrain the proposed models using future observational data.5 pagesAstrophysicstext