There are generalists and also specialists in the field of aerodynamics in the field of building gliders.

Two stage rockets, rockets with video cameras on them, on board computers logging their flights, rocket gliders that fly back to Earth.

In 1998, aircraft designer Paul MacCready looks at a planet on which humans have utterly dominated nature, and talks about what we all can do to preserve nature's balance. His contribution solar planes, superefficient gliders and the electric car.

As a youngster, I was very interested in model airplanes, ornithopters, autogyros, helicopters, gliders, power planes, indoor models, outdoor models, everything, which I just thought was a lot of fun, and wondered why most other people didn't share my same enthusiasm with them.

But that began thinking about how birds went around, and then how airplanes would, how hang gliders would fly, and then other planes, and the idea of the Gossamer Condor type airplane quickly emerged, was so logical, one should have thought of it in the first place, but one didn't. And it was just, keep the weight down 70 pounds was all it weighed but let the size swell up, like a hang glider, but three times the span, three times the cord.