I think that what the machines can do, of course, is wonderful, but it's not the same as what the brain can do.

If it should turn out that the whole of physical reality can be described by a finite set of equations, I would be disappointed, I would feel that the Creator had been uncharacteristically lacking in imagination.

We do not know how much of the environmental change is due to human activities and how much [is due] to long-term natural processes over which we have no control.

Everything in my life was luck.

[On Richard P. Feynman's live demonstration of the rigidity of the O-rings when cold that doomed the space shuttle Challenger, killing seven astronauts:] The public saw with their own eyes how science is done, how a great scientist thinks with his hands, how nature gives a clear answer when a scientist asks her a clear question.

Vegetation is really controlling what happens...whereas the emphasis in the climate models has always been on the atmosphere.

We must be careful not to discourage our twelve-year-olds by making them waste the best years of their lives preparing for examinations.