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Superconductivity is a phenomenon characterized by the significant loss of electrical resistance in certain materials when cooled to very low temperatures close to 200 degrees centigrades below zero. Materials that exhibit these special properties are known as superconductors. Superconductors have various remarkable properties, including their magnetic properties. When a superconductor is placed on top of a magnet and cooled to the required low temperatures, close to 200 degrees centigrades below zero, a list of strange, fascinating phenomena can occur, such as superconductor levitation and making magnetic objects levitate. The properties of superconductors can include their microscopic properties, practical applications, search for new materials with superconducting properties, and the search for new ways of utilizing this phenomenon. The excerpt goes on to explain that this phenomenon is characterized by a critical temperature below which the resistance becomes zero, and above which the material exhibits resistance similar to that of a normal conductor. Superconductors are used in various applications, such as detectors of high-energy particles and magnetic levitation.