SpaceHow faster-than-light explosions could reveal the universe’s secrets Some things we see in space appear to outpace light. Now we are learning to harness these bizarre optical illusions to understand the mysteries of neutron stars, gamma ray bursts and more Features
TechnologyIt is impossible to build a practical quantum broadcaster A quantum broadcasting system would end up sending slightly different information to every receiver – and efforts to sidestep this problem are too inefficient for practical use News