This is a citation of an outside article. Gravyday is not responsible for its content. Original URL below. Nuclear-fusion lab achieves ‘ignition’: what does it mean? Researchers at the US National Ignition Facility created a reaction that made more energy than they put in. Scientists at the world’s largest nuclear-fusion facility have for the first time achieved the phenomenon known as ignition — creating a nuclear reaction that generates more energy than it consumes.(more)