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

There is no doubt that parts of the world are getting warmer, but the warming is not global.

As a working hypothesis to explain the riddle of our existence, I propose that our universe is the most interesting of all possible universes, and our fate as human beings is to make it so

The progress of science requires the growth of understanding in both directions, downward from the whole to the parts and upward from the parts to the whole. A reductionist philosophy, arbitrarily proclaiming that the growth of understanding must go only in one direction, makes no scientific sense. Indeed, dogmatic philosophical beliefs of any kind have no place in science.

It is our task, both in science and in society at large, to prove the conventional wisdom wrong and to make our unpredictable dreams come true

Biology is now bigger than physics, as measured by the size of budgets, by the size of the workforce, or by the output of major discoveries; and biology is likely to remain the biggest part of science through the twenty-first century.

I think science and religion should be separate.