Nuclear collisions refer to the interactions between atomic nuclei that result in high-energy reactions, often leading to the production of new particles or nuclear transformations. This research area is fundamental to understanding the behavior of matter at extremely high temperatures and densities, such as those found in the early universe or in the cores of stars. In nuclear collision experiments, scientists accelerate nuclei to very high speeds and collide them with each other, studying the resulting particles and phenomena to gain insights into the fundamental forces and particles that govern the universe. Nuclear collisions research is conducted using particle accelerators and detectors, and has applications in nuclear physics, astrophysics, and the development of new technologies.