Horizon - Season 11 - Eps 29: The Greatest Advance Since the Wheel?
Sixty years ago a Dutch scientist discovered a phenomenon that overturned the electrical rule book. By cooling certain metals to incredibly low temperatures he found they could continue to carry an electric current for ever, even when the power supply was switched off. Today, developments of these metals - called superconductors-have led to trains that fly, magnets that could depollute rivers and machines that promise cheaper power.
About Horizon

Title: Horizon
First Air Date: 1964-02-04
Last Air Date: 2024-07-22
Status: Returning Series
Rating: 7.3/10 (from 30 votes)
Language: EN
Seasons: 61
Total Episodes: 1162
Network: BBC Two
Genres: Documentary
Production Companies: Unknown
Synopsis
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.