Superconductivity is a property of a substance at a given temperature, not of a substance at any temperature. Superconductors are things that have no electrical resistance when they are at low enough...
Can carry large quanities of energy without heat loss and are able to generate strong magnetic fields. Superconductors beneficial applications in medical imaging techniques. New superconductive films...
Superconductors are very useful because they have super powers and are able to fly, jump, and use laser beams to eliminate the current within the circuit