My own American Dream was to serve my country as best I could and make a difference in America - and in the world.

The best way to study Mars is with two hands, eyes and ears of a geologist, first at a moon orbiting Mars... and then on the surface.

Climate has been changing for billions of years.

Unless we are able to commit to a permanent growing settlement [on Mars], then I don't think just going there with humans and coming back is worth doing. The expense of planning to come back is like the people who left Europe to come to America and then to turn around and go back to Europe, it really doesn't make any sense at all.

The leader of an Earth organization who makes a commitment to history - of humans living on Earth, to begin permanent settlement/occupation of not the moon, but of another planet - this leader will have a legacy for history that will supersede Columbus, Genghis Khan or almost any recognized leader.

During the divorce process, I lived alone and tended to get extremely down on myself.

I'm not in favor of just taking short-term isolated situations and depleting our resources to keep our climate just the way it is today.