A lecture is much more of a dialogue than many of you probably realize.

As you lecture, you keep watching the faces, and information keeps coming back to you all the time.

I do believe we're all adaptable, and you're probably more adaptable than you realize.

We've committed many war crimes in Vietnam - but I'll tell you something interesting about that. We were committing war crimes in World War II, before the Nuremberg trials were held and the principle of war crimes was stated.

I have lived much of my life among molecules. They are good company.

Science goes from question to question; big questions, and little, tentative answers. The questions as they age grow ever broader, the answers are seen to be more limited.