Superconductivity occurs when the natural electrical resistance is exactly 0; it occurs in certain materials at very low temperatures. According to the Cambridge University youtube channel:
The first in a new range of powerful superconductors which could revolutionise the production of machines like hospital MRI scanners and protect the national grid have been developed by engineers at the University of Cambridge. Professor David Cardwell explains what superconductors are, why we need them, and how he and his team have devised techniques to make them more powerful than ever before.
Andrei is no scientist, but from an early age, he has been fascinated by science; that's why he went to college, and signed up for Geophysics. Feeling that there's a huge gap between science and average people, he rallied TP, started ZME Science, and gave it a green twist too. 
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Published on Thu, Jul 15, 2010 by Mihai Andrei
Post filled in: Inventions, Physics