Summary

Welcome to the zeptoverse , the world of the unprecedentedly small. A new analysis of data from the Large Hadron Collider has uncovered an extraordinarily rare particle decay that opens the door to this realm and its secrets. The standard model of particle physics tabulates all known particles and how they interact, but it cannot explain dark matter and dark energy, which fill most of our universe. Consequently, researchers test its predictions in particle collider experiments, searching for signs of new particles and forces.

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