One night in October, 2009, a young man lay in an fMRI scanner in Liège, Belgium. Five years earlier, he’d suffered a head trauma in a motorcycle accident, and since then he hadn’t spoken. He was said ...

If a baby starts to cry several hours after drinking his last bottle, his mother knows precisely what he's feeling: He's hungry. But suppose a woman's eyes brim with tears while she watches a DVD. Her ...

The President's former lawyer accuses him of illegal activities. A moghul denies dozens of charges of sexual assault. The world's biggest Internet corporation makes a deal with a nation it once ...