Back in 2007, I had the opportunity to meet Professor Stephen Hawking through the X PRIZE Foundation. In my first conversation with him I learned that he was passionate about flying into space someday.

Find that thing that you are passionate about, that you will do day or night whether someone pays you or not...because if you have that, you will have gold.

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

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

It's sad that the U.S. government doesn't fund risky research anymore.

More than ever before in history, individuals can now band together to solve grand challenges. We face enormous problems, but we 'as individuals' have enormous power to solve them.

We are not going to stop here on planet Earth. We're going to move out to other planetary bodies.