The growth of technology is such that it is not possible today for a nuclear physicist to switch into medical physics without training. The field is now much more technical. More training is needed to do the job.

I am not unhappy that my contribution was not recognized. I am sure it helped my career.

I would not encourage everyone to take up this profession. Not everyone is suited for any particular field.

It is likely that we need more radiation to improve our longevity.

My childhood dream was to study mechanical engineering. After reading 'The Mysterious Island' - which I read 25 times as a boy - I thought that was the best thing a person could do. The engineer in the book knows mechanics and physics, and he creates a whole way of life on the island out of nothing. I wanted to be like that.

The powers, aspirations, and mission of man are such as to raise the study of his origin and nature, inevitably and by the very necessity of the case, from the mere physiological to the psychological stage of scientific operations.

I spend time in the classroom. I think more of them aren't political science than are political science. I particularly like talking to journalism students.

You know, there was a time, just before I started to study physical science, when astronomers thought that systems such as we have here in the solar system required a rare triple collision of stars.