PhysicsThe biggest threat to Chernobyl is no longer radiation Forty years after the world’s biggest nuclear disaster, the safety of Chernobyl hangs in the balance – though not because of the radiation risk Leader
PhysicsParticles seen emerging from empty space for first time By tracing the origins of an unusual, short-lived particle, researchers have gathered some of the strongest evidence yet that mass can emerge from fluctuations in the vacuum News