A hadron collider is a type of particle accelerator used in high-energy physics research to collide beams of hadrons, such as protons or ions, at extremely high speeds. These collisions create extremely high-energy conditions that can simulate the early moments of the universe and allow scientists to study the fundamental particles and forces that make up the universe. Some of the most famous hadron colliders include the Large Hadron Collider (LHC) at CERN in Switzerland, which discovered the Higgs boson in 2012, and the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory in the United States, which studies the properties of nuclear matter under extreme conditions. Hadron colliders play a crucial role in advancing our understanding of particle physics and the fundamental laws of nature. They provide valuable insights into the mysteries of the universe and help scientists test and refine our current understanding of physics.