2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40019Over the past decade, Finite Temperature Quantum Field Theories have benefitted from impressive developments, while an increasing number of intriguing points were made. Some of them are presented here, recent and older, in a non exhaustive list.To appear in the proceedings of the 5th workshop on QCD, Villefranche-sur-Mer, 3-8 January 2000. Latex file, 8 pages, no figuresHigh Energy Physics - PhenomenologyPuzzling aspects of hot quantum fieldstext