Interesting fact:

Leonardo da Vinci was one of the first visionaries that believed humans could fly with the help of an apparatus, but it was a set of brothers who actually demonstrated human flight in 1903. Their invention has evolved to the modern airliners that now ferry us across the globe so efficiently. The notion of being able to travel thousands of miles in just hours—what we now take for granted—would have seemed unfathomable not too many generations earlier.