Not every scientific discovery is heralded by a clear cry of "Eureka!" A case in point is the study of an exotic state of matter known as a quark-gluon plasma (QGP), in which hundreds of ordinary protons and neutrons
melt together and form a fiery soup of free-roaming quarks and gluons. The universe consisted of such a quark stew 10 microseconds after the big
This article was originally published with the title Fireballs of Free Quarks.