Even though the physics behind superconductors is not fully understood, they are currently being used in several devices. Magnetic Resonance Imaging (MRI) is an example of one such device in use at vast number of hospitals. Superconductors in the MRI device are used to create a very large focused magnetic field. When the field penetrates a human body, it penetrates the nuclei of countless hydrogen atoms. Each hydrogen nuclei has its' own spin and the field disrupts the spin creating a nuclear magnetic resonance (NMR) which is detected by the MRI device. This data is fed through a computer and translated into a graphical image. The movie on the right is an MRI taken of a 47 day old human embryo