2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203830After years of experimental and theoretical efforts, direct photons become a strong and reliable tool to establish the basic characteristics of a hot and dense matter produced in heavy ion collisions. The recent direct photon measurements are reviewed and a future prospect is given.8 pages, 8 figures, Invited plenary talk at Quark Matter 2008Nuclear Experimenttext