Keira Knightley and Kristen Stewart are its best ambassadors. Instead of curving upwards, their mouths curve downwards, ...

Dogs change their facial expressions when they know people are looking at them—perhaps in an effort to communicate. For instance, canines in the study would make the classic "sad puppy face"—raising ...

Facial expressions have been called the "universal language of emotion," but people from different cultures perceive happy, sad or angry facial expressions in unique ways, according to new research.

WASHINGTON – Creases and furrows on someone's face may put a wrinkle in our ability to properly judge his or her emotions, a new study suggests. In the study, participants viewed photographs of 64 ...

Dogs are able to recognize human facial expressions, a new study determined. Canines can tell the difference between happy and sad human faces. This is the first time that a species, other than human ...

Sad people are apparently better than happy people at face recognition, an upside to being down in the dumps that is yielding insights into how mood can affect the brain. The findings, based on ...