Superconductors are recently discovered high-tech materials that display zero resistance to the flow of electrons. Potential uses include superfast supercomputers and levitating trains that travel upwards of 350 miles/hour. The US federal government has earmarked nearly a billion dollars to build some of these trains.
This is a cartoon of the crystal structure of a superconductor.
This image represents the superconducting layer of atoms. It is weakly bonded to the rest of the crystal structure.
This image illustrates the thermal motion of the atoms in the superconducting layer while at low temperatures. The electrons can simply surf the wave without expending energy. At higher temperatures the waves become distorted, like wind-blown white capped waves and the surfing of the electrons decomes difficult.