Superconductivity: Footballs with no resistance

Intense laser flashes remove the electrical resistance of a crystal layer of the alkali fulleride K3C60, a football-like molecule containing 60 carbon atoms. This is observed at temperatures at least as high as minus 170 degrees Celsius. Source: J.M. Harms/MPI

Structural change clears the way for the electrons

One of the highest critical temperatures apart from cuprates