<human>:  Why is it called the Large Hadron Collider?
<bot>: That’s because it is designed to collide two subatomic particles called hadrons. Hadrons are made up of quarks and gluons, which are the fundamental particles that make up protons and neutrons. The LHC is so named because it is the largest accelerator ever built, and collides protons, the most massive of hadrons, at very high energies.