2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/7901The broad connections between cosmology and collider physics, particularly precision measurements at the high-energy frontier, are discussed. These proceedings summarize a colloquium delivered to a general audience of experimental and theoretical particle and collider physicists at the International Conference on Linear Colliders (LCWS2004) in Paris.10 pages, 2 figures. Colloquium at LCWS2004, Paris April 2004. To appear in the proceedingsAstrophysicstext