If we want to rely on nuclear fusion to power the world’s homes, the first step is making reactors that can run as hot and as long as possible.
Now, an experimental reactor called KSTAR in Daejeon, Korea, has set a new world record.
The massive doughnut-shaped device, which has been dubbed ‘Korea’s artificial sun’ ran at 100 million°C (180 million°F) for 48 seconds.
