Sharon Begley is senior health and science correspondent at Reuters. She is the coauthor of the 2002 book The Mind and the Brain and the author of the 2007 book Train Your Mind, Change Your Brain.

Fright Night

Films like Paranormal Activity 3 still make massive box-office hauls, and science knows why. Sharon Begley reveals why scary flicks give us a powerful feeling of catharsis and reinforce old-fashioned beliefs about morality.