Physicists have achieved a milestone by directly measuring the temperature evolution of quark-gluon plasma — the searing, primordial matter that filled the universe microseconds after the Big Bang. Credit: Shutterstock A team led by Rice University physicist Frank Geurts has achieved a major milestone in particle physics by measuring the temperature of quark-gluon plasma (QGP) at different stages of its evolution. This plasma is a form of matter thought to have filled the universe only