- China has tested an airborne blimp called the S4000
- It generates electricity from wind power at an altitude of 4,000 meters
- The airship can move to wherever it is needed most
If you thought the age of blimps was over, think again. China has just launched a successful test of a helium-filled airship that is used to generate electricity from the sky, and it could mean a return to the air of the skyfaring vehicles that went out of fashion almost 100 years ago.