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.

A new study reveals that most people fail to recognize racial bias embedded in AI systems, even when it is visible in the training data.

It is perhaps the world's most famous painting: Leonardo da Vinci's Mona Lisa. The ambiguous facial expression of Mona Lisa was long thought to be one of the main reasons for its great appeal: Is she ...

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 ...