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

Ray Bradbury is one who is contributing to the understanding of the imagination and the curiosity of the human race.

We need the next generation to be motivated and to push technological boundaries, to seek out new innovations.

The first footfalls on Mars will mark a historic milestone, an enterprise that requires human tenacity matched with technology to anchor ourselves on another world.

Mars has a bit of air pressure; maybe we can build up that atmosphere to be a bit more accommodating to humans.

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?

My family has always supported my activities, whether it was doing combat in Korea, flying progressively and challenging fighter-jet aircraft in Europe, or studying for a doctor's degree at MIT. They have been always very supportive and understanding of the challenges and risks involved in my career. A family needs to work as a team, supporting each other's individual aims and aspirations.