I'm sure that there are places in the deserts in Australia that could be similar to where we might want to go on Mars.

There's a need for accepting responsibility - for a person's life and making choices that are not just ones for immediate short-term comfort. You need to make an investment, and the investment is in health and education.

Does it make sense for the U.S. to expend hundreds of billions of dollars to mount a new Apollo-style program to return to the moon? Or have we blazed that trail? Shouldn't we help other nations achieve this goal with their own resources but with our help?

I don't watch 'American Idol,' but I wouldn't call it 'undignified.'

We could have human intelligence in orbit around Mars, building things there.

Fighter pilots have ice in their veins. They don't have emotions. They think, anticipate. They know that fear and other concerns cloud your mind from what's going on and what you should be involved in.

Going to Mars would evolve humankind into a two-planet species.