Fusion research is a field of study focused on harnessing the energy produced by nuclear fusion reactions, the same process that powers the sun. Fusion reactions involve forcing together two light atomic nuclei to create a heavier nucleus, releasing a large amount of energy in the process. Scientists are working to develop fusion as a potentially limitless and clean source of energy, with projects such as ITER (International Thermonuclear Experimental Reactor) aiming to demonstrate the viability of fusion power on a commercial scale. Fusion research also involves studying plasma physics, magnetic confinement, and other technologies necessary for achieving controlled fusion reactions.