Which was the invention that propelled the construction of higher and higher buildings? Concrete? Iron? It's the elevator. From the Tower of Babel to the Kingdom Tower in Saudi Arabia, humankind has always searched to build bigger and higher. What are the scientific advance and technologies that have made it possible to 'touch' the sky.
 

To fly... A dream that has shaped the history of humanity. A story of crazy flyers - inventors, scientists - pursuing their dream, often risking their lives doing so. Matthieu Barreau is an engineer, teacher and pilot. He went in search of these intrepid pioneers... and their incredible machines.