Even the ancient Greeks believed that substance consists of tiny particles called atoms. The word "atom" means "indivisible" in Greek. However, with the development of science, it became clear that neither an atom, nor a proton and neutron are truly elementary particles. They consist of the smaller ones - quarks. Then neutrinos and antiprotons were discovered and now science knows about 400 different particles. To study their qualities and structures the mankind invented a very smart device - a collider. Let's look at some of them and learn how they function.