SOLAR-POWERED AIRSHIP WILL CIRCLE THE WORLD NON-STOP WITHOUT FUEL

Summary from the TLDR newsletter

Solar Airship One is a 151-meter-long airship that has its entire upper surface covered in solar film. The airship is able to run on solar power during the day and store enough extra power to continue during the night. Solar Airship One will have an average speed of 83 kilometers per hour. While it will run on renewable energy, the airship still uses 50,000 cubic meters of helium, a completely non-replaceable element.