The fourth and final motivator is the desire for significance: the need for one’s life to matter, the need to make a difference in the world. - Peter Diamandis

It is important to remember that in 1953 none of the technology for these futuristic journeys existed. No one knew how to go that fast and survive. Even the most optimistic die-hard visionaries did not expect a lunar landing any sooner than the proverbial “Year 2000.” The only voice telling them they could do it was a curve on a piece of paper. But the curve was right. Just not politically correct. In 1957 the USSR launched Sputnik, right on schedule. Then US rockets zipped to the Moon 12 years later. As [Damien] Broderick notes, humans arrived on the Moon “close to a third of century sooner than loony space travel buffs like Arthur C. Clarke had expected it to occur.

The impossible is often, almost every time, untried.

Festo, for one example, has created a robot that flies like a bird.