Wind energy is taking off all over again. This time, literally. In China, a multi-institute research and development project has created a series of large-scale floating turbine prototypes. The helium ...

In fact, the turbines were able to reach an efficiency of 53%, which is just shy of Betz's Law, a theorem that says no wind turbine would be able to convert more than about 59.3% of wind energy into ...

Wind energy infrastructure doesn’t produce power if the air isn’t moving, and solar doesn’t generate power if the sun’s not out. But that doesn’t mean that either source of energy is "worthless" ...

Look up in the sky, it's a bird, it's a plane, it's ... a 20,000 cubic-meter power-generating airship, floating 6,560 ft (2,000 meters) above the ground. Introducing the S2000 stratospheric airborne ...