Eight scientists who were part of a team that discovered a room-temperature superconductor have asked for their paper to be retracted. The discovery, led by Ranga P. Dias, a professor at the University of Rochester, has drawn scrutiny due to allegations of scientific misconduct against Dias. The request for retraction raises questions about the vetting process at the prestigious journal, Nature, which published the paper. Superconductors, which allow electricity to flow without resistance, typically require extremely cold temperatures.