As lower-cost phones begin to penetrate, they'll become the educator and physician everywhere on the planet.

I believed that once we got to the Moon, there was no stopping us. But in fact, we did stop.

Humans are the worst control system to put in front of a car.

I get demoralized by organizations that start off with a mission and pull back when they find it's risky.

I'm a nine-year old kid inside and my passion has been all my life to want to travel into space.

The day before something is a breakthrough, it’s a crazy idea.

In 1980, during my sophomore year at MIT, I realized that the school didn't have a student space organization. I made posters for a group I called Students for the Exploration and Development of Space and put them up all over campus. Thirty-five people showed up. It was the first thing I ever organized, and it took off!