Quark wakes reveal early universe plasma flowed like a liquidby Clarence OxfordLos Angeles CA (SPX) Jan 30, 2026In its first instants, the universe formed a searing quark gluon plasma in which quarks and gluons moved at near light speed before cooling to build the protons and neutrons that dominate matter today. The results demonstrate that quark gluon plasma is dense enough to slow energetic quarks and to produce splashes and swirls that mark it as a true primordial soup, resolving a long standing debate over how strongly the plasma reacts to passing particles. Those measurements will help determine key characteristics of quark gluon plasma, including how it transports energy and momentum and how its fluid like behavior shaped the universes evolution during its first fractions of a second. The wake signatures align with the predictions of Rajagopals hybrid model, providing direct evidence that quark gluon plasma responds collectively and flows as a fluid when energetic particles traverse it, rather than behaving as a simple collection of independent particles. By tracking how the wakes bounce, spread, and fade, future studies can refine estimates of parameters such as viscosity and sound speed in quark gluon plasma and improve simulations of how the early universe expanded and cooled out of its primordial state.