Scientists at CERN, together with MIT physicists, have found strong evidence that the universe’s first “primordial soup” acted like a liquid. So quark-gluon plasma really is a primordial soup.”How do Quark-Gluon-Plasma fireballs explode into Hadrons? The findings show that quark-gluon plasma (QGP) was the universe’s very first liquid, and one of the most extreme. Out of 13 billion collisions, they found about 2,000 events that produced a Z boson. Again and again, they saw fluid-like splashes on the opposite side of the Z boson, unmistakable signs of a quark wake.