I like to call the difference between research and development. Some people use that interchangeably. They'll say R&D. They're two totally different things.

When theres ever a breakthrough, a true breakthrough, you can go back and find a time period when the consensus was 'well, thats nonsense!', so what that means is that a true creative researcher has to have confidence in nonsense.

No one knows how to make going to orbit orders of magnitude safer and orders of magnitude more affordable.

I like to call the difference between research and development. Some people use that interchangeably. They'll say R&D. They're two totally different things.

We need affordable space travel to inspire our youth, to let them know that they can experience their dreams, can set significant goals and be in a position to lead all of us to future progress in exploration, discovery and fun. Thanks to the X Prize for the inspiration.

The criticism is, once I get something flying, I lose interest in it.

Within 25 years, virtual reality meetings will be essentially transparent to being there in person. Once we can do this, the idea of climbing into an aircraft, and burning up huge quantities of fossil fuels to propel our bodies and briefcases full of papers, will seem absolutely backward.