The first high-temperature superconductor was discovered in 1986 by IBM researchers Karl Müller and Johannes Bednorz, for which they were awarded the Nobel Prize in Physics in 1987. Since then many other materials with even higher superconducting temperatures have been identified.
Although superconductivity at very low temperatures has been understood since 1957 via BCS theory - 'high temperature' superconducting is still unexplained.
Since there is no explanation as yet, room-temperature superconductors (which would have the capacity to totally revolutionise human technology) are not ruled out. more