The project took 12 years of study, trials and challenges to overcome the technical problems, not to mention the financial difficulties.

But as the co-pilots kept constantly pushing back the limits of the impossible, people started to be interested in the project and were willing to sponsor it.

And here they are today, with Solar Impulse 2.

They are also flying the flag for renewable energy, nature and the environment.

"Our goal is to interact with different people and countries and show local governments the potential of clean energy," Piccard said.

Asked about his next dream, Piccard said the two are open to all options and ready for anything.

"If I can tell you what I will do after this flight, then it's no longer an adventure, it's a business plan." he said.

"Maybe we will build Solar Impulse 3, or maybe we will try to build a high-altitude telecommunications platform. We don't know yet."

But no matter what direction the Piccard family explores, there is always the same message: be brave and creative, go for your dream and never stop trying to make the world a better place.