I fully expected that, by the end of the century, we would have achieved substantially more than we actually did.

I think we're going to the moon because it's in the nature of the human being to face challenges. It's by the nature of his deep inner soul... we're required to do these things just as salmon swim upstream.

Geologists have a saying - rocks remember.

Science has not yet mastered prophecy. We predict too much for the next year and yet far too little for the next 10.

NASA has been one of the most successful public investments in motivating students to do well and achieve all they can achieve. It's sad that we are turning the programme in a direction where it will reduce the amount of motivation and stimulation it provides to young people.