I'm Susan Greene.

Greene laughs the hardest.

No, Greene said through chuckles.

Brian Greene on string theory

Graham Greene is my favorite author.

Graham Greene is a favorite author of mine.

After a few minutes Greene thanks the crowd, and suddenly it's over.

For nearly a decade, Cassandra Greene has directed the annual reenactment of the Moore's Ford Bridge lynchings.

It's difficult to watch, and even more difficult to look away, but Greene said that's the point.

As the final notes of the song fade, Greene invites the crowd to move closer and inspect the bodies.

Physicist Brian Greene explains superstring theory, the idea that minscule strands of energy vibrating in 11 dimensions create every particle and force in the universe.

What could be more glamorous than understanding the entire universe, grand unification? And, by the way, it helps if you're Brian Greene he has other kinds of glamour.

Rehearsals for this year's production began in June, and on the first day nearly 30 actors a dozen white and the rest black crowded into a room and listened as Greene launched into a well rehearsed overview of the play.

Maxine Greene, who's a wonderful philosopher who's as old as Studs, and was the head of a philosophy great, big philosophy kind of an organization I went to her and asked her what are the two things that she doesn't know, that she still wants to know.

Greene found that people asked to make a moral judgment about personal violations, like pushing the stranger off the footbridge, showed increased activity in areas of the brain associated with the emotions. This was not the case with people asked to make judgments about relatively impersonal violations like throwing a switch.

Joshua Greene, a philosophy graduate now working in psychology who has recently moved from Princeton University to Harvard, studied how people respond to a set of imaginary dilemmas. In one dilemma, you are standing by a railroad track when you notice that a trolley, with no one aboard, is heading for a group of five people.

Moral values have powerful physiological representations in humans, too, and we feel them strongly when they are violated. The philosopher Josh Greene and his colleagues at Princeton University have shown that personal moral dilemmas (for example, whether you would directly kill one person to save seven others) use our emotions rather than higher cognition to the chagrin of many philosophers who claimed otherwise.

Philosophers have puzzled about how to justify our intuitions in these situations, given that in both cases, the choice seems to be between saving five lives at the cost of taking one life. Greene, however, was more concerned to understand why we have the intuitions, so he used functional Magnetic Resonance Imaging, or fMRI, to examine what happens in people s brains when they make these moral judgments.