Quark-Gluon Plasma is a state of matter that exists at extremely high temperatures and densities, where quarks and gluons, the fundamental building blocks of protons and neutrons, are no longer confined within particles. This state is believed to have existed just moments after the Big Bang, when the universe was hot and dense enough for these particles to move freely. Scientists study Quark-Gluon Plasma by recreating the conditions of the early universe in particle accelerators like the Large Hadron Collider. By smashing heavy ions together at high speeds, researchers can produce this exotic state of matter, helping to deepen our understanding of the fundamental forces and particles that make up the universe.