Science and religion are, of course, two different ways of looking at the universe; and it's the same universe with two different windows.

Aviation is the branch of engineering that is least forgiving of mistakes.

No matter how far we go into the future, there will always be new things happening, new information coming in, new worlds to explore, a constantly expanding domain of life, consciousness, and memory.

The thing that makes me most optimistic is China and India - both of them doing well.

New directions in science are launched by new tools much more often than by new concepts. The effect of a concept-driven revolution is to explain old things in new ways. The effect of a tool-driven revolution is to discover new things that have to be explained.

The average student emerges at the end of the Ph.D. program, already middle-aged, overspecialized, poorly prepared for the world outside, and almost unemployable except in a narrow area of specialization. Large numbers of students for whom the program is inappropriate are trapped in it, because the Ph.D. has become a union card required for entry into the scientific job market.

I think it's a big mistake to decide too soon what you're going to do with your life.