Paul MacCready -- aircraft designer, environmentalist, and lifelong lover of flight -- talks about his long career. After his record-breaking work on human-powered aircraft in the 1970s, with the Gossamer Condor and Gossamer Albatross, MacCready's attention turned to addressing a problem he calls "Nature vs. Humans." The result: a pioneering electric car, refined alternative energy sources, and (bringing his enthusiasms full circle) a breathtaking solar plane.

Filmed March, 2007.