Majorana fermions are a class of particles that obey the Majorana condition, which is the requirement that they be their own antiparticles. They were first predicted by Italian physicist Ettore Majorana in 1937.
Since then, there has been much theoretical and experimental work on Majorana fermions, and they have been found to play a significant role in a variety of physical phenomena, including neutrino oscillations, topological insulators, and superconductivity. In 2012, the first experimental evidence for the existence of Majorana fermions was reported.
The study of Majorana fermions is an active area of research with many potential applications in quantum computing and other emerging technologies.