Potty training dogs has a lot to do with raising your voice and pointing fingers. But maybe a smile or a frown is the way to go. Until now, that might seem like something only Cesar Millan of "Dog ...

Facial expressions are a key asset in our arsenal of communication methods. Without saying a word, we can alert those around us to our emotional state—ranging from elation to sorrow—simply by flexing ...

Do rats feel joy? It can be hard to tell, since they can’t exactly greet us with a grin. But now, for the first time, scientists have spotted the rat equivalent of a smile—and it’s all in the ears.

Autistic and non-autistic people express emotions differently through their facial movements, according to a new study, which may help to explain why emotional expressions are sometimes misinterpreted ...