2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/129138I review recent developements in lattice QCD at finite temperature, including the determination of the transition temperature T_c, equation of state and diffenet static screening lengths. The lattice data suggest that at temperatures above 1.5T_c the quark gluon plasma can be considered as gas consisting of quarks and gluons.Talk presented at 23rd Winter Workshop on Nuclear Dynamics, Latex, 8 pages, 5 figures, uses bigsky2007.sty. Typos corrected, further discussion of Tc is addedNuclear Theorytext