Dubbed Nephelios, the solar-powered helium blimp was designed and built by high school engineering students in France. The history making blimp will begin test flights in the next 2 weeks, and by summer’s end the designers hope to fly Nephelios across the English Channel, “just to show that it’s possible.” Nephelios will be the first manned solar airship in existence, and its inaugural flight will prove that CO2-free air travel is now a reality.