Physicists at CERN have made a breakthrough in understanding the matter-antimatter asymmetry that underpins the existence of the universe. Using data from the Large Hadron Collider's LHCb experiment, researchers observed charge-parity (CP) symmetry breaking in the decays of baryons, a class of subatomic particles. This asymmetry, which had previously been elusive, provides critical evidence explaining why the universe contains more matter than antimatter, despite the Big Bang producing equal amounts of both. The findings challenge aspects of the standard model of particle physics and open pathways to exploring phenomena beyond current theories. Published in the journal Nature, this discovery is regarded as a key step toward solving one of the most profound puzzles in modern physics and could help explain the composition of 95% of the cosmos that remains poorly understood.