Particle accelerators offer the best way to explore the smallest building blocks of the Universe. When particles collide in these machines, they release energy, which results in the creation of new particles. Particle accelerators are like powerful microscopes that allow us to look deeper into the heart of matter. Since they first appeared  at the beginning of the 20th century, several new particles have been identified. In addition, the technological advances associated with  these instruments have enabled other great discoveries that are crucial for humanity.