[T]he yeoman's work in any science, and especially physics, is done by the experimentalist, who must keep the theoreticians honest.

Scientists willing to risk their reputations on higher dimensions soon found themselves ridiculed by the scientific community. Higher-dimensional space became the last refuge for mystics, cranks, and charlatans.

I'm not a science fiction writer, I'm a physicist. These are scientists who are making the future in their laboratories.

Global warming is controversial, of course, but the controversy is mainly over whether human activity is driving it.

I used to watch the old 'Flash Gordon' series on TV, and it was thrilling to rocket to the planet Mongo every week. But after a while, I figured out that although Flash got the girl and all the accolades, it was really Dr. Zarkov who made the series work. Without Dr. Zarkov, there could be no Flash Gordon.

I realized very early in life what my abilities and limitations were, and foreign languages was definitely one of my limitations. With strenuous effort, I just barely passed my French class at Harvard so I could graduate.

You can mass-produce hardware; you cannot mass-produce software - you cannot mass-produce the human mind.