For me, one of the most fertile consequences of the space program is the extent to which it stimulates people to innovate because they want to create a different tomorrow than what they're living in today. And it's that culture of innovation that spawns entirely new economies.

I agree that we should go back to the moon and on to Mars. We should treat all objects in the solar system, including comets and asteroids, as exploration targets.

Not only do we live among the stars, the stars live within us.

As the plow pushes through a parking lot of light fluffy snow, the snow clumps together in bigger and bigger chunks. Out in space, pressure hitting a gas cloud has a similar effect, except, instead of snowballs, you get stars!

I've accomplished enough in life so that I do not fear death.

You say you're worried about kids? I'm not worried about kids, I'm worried about grown ups... Children are not the problem here... We spend the first year of their lives teaching them how to walk and talk, and the rest of their lives telling them to shut up and sit down.

The most successful scientists in the history of the world are those who posed the right questions