Two experiments in which hydrogen fusion generated more energy than had been put in to the hydrogen succeeded, an advance that revives optimism in thermonuclear fusion .

Scientists say they've taken a key step toward harnessing nuclear fusion as a new way to generate power , an idea that has been pursued for decades.

South Korea has embarked on the development of a preliminary concept design for a fusion power demonstration reactor in collaboration with the US Department of Energy's Princeton Plasma Physics Laboratory (PPPL) in New Jersey. The project is provisionally named K-DEMO (Korean Demonstration Fusion