...quickly in the presence of a masking smile, a fake smile. They're picking up on these leaks of emotions," said Nancy Etcoff, a psychologist at Massachusetts General Hospital who led a study published in Thursday's issue of the journal Nature...

...gives reasons for selling her eggs, ranging from "to not be dependent on a man," to "I want to help others." Nancy Etcoff, the Cambridge-based author of "Survival of the Prettiest: The Science of Beauty," says it's natural to consider...