In a new milestone for fusion energy research, physicists in China say they have exceeded the plasma-density limit.

Nuclear fusion has long been the energy world’s moonshot, a reaction so powerful and so difficult to tame that many physicists once doubted it would ever be harnessed on Earth. Yet in the past few ...

What if the key to solving the world’s energy crisis was hidden in a process so ambitious, so technically demanding, that even experts once dismissed it as science fiction? For decades, nuclear fusion ...