Work with a partner. One of you should write precise instructions for the facial expression needed to portray this line effectively. The other has to play the line according to these instructions.

This story appears in the October 2017 issue of National Geographic magazine. Let’s face it: When it comes to expressions, a horse is no one-trick pony. Recent findings have revealed that our ...

When not being perfect, we are decidedly good. Should I so much as display a downbeat facial expression when fumbling a social nicety, the response is nothing short of impassioned: “No ...

If a mouse is in a lot of pain, an experienced handler may see it in the animal’s facial expression—its narrowed eyes and bulging cheeks. But, subtler facial expressions may be more difficult to match ...