The first round-the-world flight powered only by the sun has touched down in Abu Dhabi on 26th July 2016, after taking off from there more than a year ago.
Since the Solar Impulse 2 plane took off in March 2015, it completed more than 500 flight hours, cruising at an average speed of between 28 mph (45 kmh) and 56 mph (90 kmh). It made 16 stops around the world (Oman, India, Myanmar, China, Japan, the United States, Spain, Italy, Egypt and the United Arab Emirates) as moment to argue for the value of such clean energy.
In a statement this week, Borschberg said it is no longer a question of whether it's possible to fly without fuel or polluting emissions: "By flying around the world thanks to renewable energy and clean technologies, we have demonstrated that we can now make our world more energy efficient".
The aircraft is uniquely powered by 17,248 solar cells that transfer energy to four electrical motors that power the plane's propellers. It runs on four lithium polymer batteries at night. The plane's wingspan stretches 236 feet (72 meters) to catch the sun's energy.