There is nothing in biology yet found that indicates the inevitability of death. This suggests to me that it is not at all inevitable and that it is only a matter of time before biologists discover what it is that is causing us the trouble.

All theoretical chemistry is really physics; and all theoretical chemists know it.

The problem of creating something new, but which is consistent with everything which has been seen before, is one of extreme difficulty.

Ordinarily it would take me about fifteen minutes to get a hallucination going," wrote Feynman, "but on a few occasions, when I smoked some marijuana beforehand, it came very quickly.

If all of this, all the life of a stream of water, can be nothing but a pile of atoms, how much more is possible?

The thing that doesn't fit is the thing that is most interesting.

It appears that there are enormous differences of opinion as to the probability of a failure with loss of vehicle and of human life. The estimates range from roughly 1 in 100 to 1 in 100,000. The higher figures come from the working engineers, and the very low figures from management.