<ul><li>Physicists on the ATLAS experiment at CERN's LHC have produced top quark-antiquark pairs in collisions involving heavy nuclei.</li><li>The collisions recreate the quark-gluon plasma, a state of matter that existed microseconds after the Big Bang.</li><li>Studying the behavior of top quarks within the quark-gluon plasma could enhance our understanding of the early universe and quantum chromodynamics.</li><li>The production rate of top quarks observed in the experiments matched theoretical predictions based on the strong nuclear force.</li></ul>

Top-quark pairs at ATLAS could shed light on the early universe

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