Technology without morality is barbarous; morality without technology is impotent.

If the tools are bad, nature's voice is muffled. If the tools are good, nature will give us a clear answer to a clear question.

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.

Life is nature's way to give mind oportunities it wouldn't otherwise had.

We have no reason to think that climate change is harmful if you look at the world as a whole. Most places, in fact, are better off being warmer than being colder. And historically, the really bad times for the environment and for people have been the cold periods rather than the warm periods.

Everything in my life was luck. The key to having an interesting life is to always say "yes" to anything crazy.

We simply don't know yet what's going to happen to the carbon in the atmosphere.