Collider physics is the study of fundamental particles and their interactions by smashing them together at high speeds in large machines called colliders. These experiments help scientists understand the basic building blocks of matter and the forces that govern their behavior. One of the most famous colliders is the Large Hadron Collider (LHC), located at CERN in Switzerland. By colliding protons and other particles, researchers can observe rare events and discover new particles, such as the Higgs boson, which provides insight into the origins of mass in the universe.