Rough seas for the superconducting wind turbine: To keep offshore turbines light, engineers look beyond superconductors to a new permanent-magnet tech

Try to wrap your head around this: A slender tower stretches 100 meters above the waves. Blades, each one of them nearly 60 meters long, face down the briny spray as they turn about a 250-metric-ton nacelle at the top of the tower, which houses the turbine generator and everything else needed to produce electricity.