This week, Carolyn Porco takes us on a flight past our usual horizons. As the Imaging Scientist on the Cassini mission, she's among the first to see images of Saturn, its rings and moons and complex mysteries. She shows breathtaking views of planetary space and of our own blue planet -- and talks about the possibility of life somewhere else.


Carolyn Porco: Fly me to the moons of Saturn

Planetary scientist Carolyn Porco says, "I'm going to take you on a journey." And does she ever. Showing breathtaking images from the Cassini voyage to Saturn, she focuses on Saturn's intriguing largest moon, Titan,with deserts, mudflats and puzzling lakes, and on frozen Enceladus, which seems to shoot jets of ice.  Watch it now >>

Paul MacCready: Flying on solar wings

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. Watch it now >>