"Physicists have long been puzzled over a mystical link between particles called entanglement – and now they've established this bizarre connection in a new experiment. When two or more particles are entangled, they retain a connection even if separated across an entire galaxy. If an action is performed on one particle, its linked partner will also respond. ... Probing entanglement like this will not just provide scientists with more information about the freaky ways our world works, but also help them understand behavior of entangled particles as ingredients for superfast quantum computers."