The real mark of your character comes from not how you react to your successes, of which I know there will be many. How you react to your failures, o….

So with imagination, ingenuity and audacity, explore, discover, change the world. And have fun while you're at it. Always take time out to love and t….

There are no practical alternatives to air transportation..

We want to build colonies on the Moon, Mars, the Moons of other planets, and even nearby asteroids. We want to make space tourism and commerce routin….

You must also realize that the stuff of excellence-truth, real scientific truth-can be elusive... It is too often covered by the heavy fog of fear an….

Books can be passed around. They can be shared. A lot of people like seeing them in their houses. They are memories. People who don't understand book….