Expressive speech, with modulation in pitch and volume, and a minimum of noticeable pauses, boosts credibility and enhances the impression of intelligence.

If memories were indeed like what a camera records, they could be forgotten, or they could fade so that they are no longer clear and vivid. But it would be difficult to explain how people could have memories that are both clear and vivid while also being wrong. Yet that happens, and it is not infrequent.

We should keep in mind that it is easy to concoct stories explaining the past or to become confident about dubious scenarios of the future. We should view both explanations and prophecies with skepticism.

I always liked movies, so I started writing for Hollywood, but my day job was physics.

One of President Obama's first acts was to give a massive boost to America's scientific community.

I was born in Beijing and raised in England and America. I studied political science in college and film in graduate school in New York.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

I really worry about the way in which you, as a celebrity, are disproportionately treated. Frankly, the industry is almost single-handedly designed to interfere with people's moral chemistry.