articles. In the course of asymptotic
            freedom, the strong interaction becomes weaker at higher temperatures.
            Eventually, color confinement would be lost and an extremely hot plasma
            of freely moving quarks and gluons would be formed. This theoretical phase
            of matter is called quark-gluon plasma.[81] The exact conditions needed
            to give rise to this state are unknown and have been the subject of a great
            deal of speculation and experimentat