The Joint European Torus tokamak reactor near Oxford, UK, is a test bed for the world’s largest fusion experiment — ITER in France.Credit: Christopher Roux (CEA-IRFM)/EUROfusion (CC BY 4.0) A 24-year-old nuclear-fusion record has crumbled. Scientists at the Joint European Torus (JET) near Oxford, UK, announced on 9 February that […]