I'm convinced that sending people to Mars is so expensive that if you go once and bring the people back and then go again and bring the people back, we're eventually going to run out of money. But what if we send people the first time and they don't come back? What if they stay there?

There are a lot of people that get interested in something, and they hear about it, and they read about it, and then they watch it happen, and that's why I had quite an interest in the lottery because you'd interest a lot of people, and then just a few would win a chance to do something.

To appropriately respond to an emergency requires a very clear mind, to cooly analyze what the observations are and how to fix it.

Pascal Lee is a true pioneer of Mars exploration.

I am excited to think that the development of commercial capabilities to send humans into low Earth orbit will likely result in so many more Earthlings being able to experience the transformative power of space flight.

Kids, help your parents if they don't know how to use a smartphone.

I want to reach a new generation. That's why I am Twittering now. I have a BlackBerry, an iPhone and a Mac.