Molecular computer graphics showing the crystal structure of one of the new generation of high- temperature superconductors - yttrium-barium- copper oxide (Y-Ba2-Cu3-O7-x). Discovered in 1987, the new superconducting ceramic materials are expected to lead to a technological revolution, & are the subject of intensive worldwide research. The two Swiss researchers who discovered these new superconducting materials were awarded the 1987 Nobel Prize for physics. This superconducting ceramic is classified as a distorted perovskite structure. (Further information in Nature, 28 May 1987, page 310).