Want to know what expressions people in Papua New Guinea or Siberia use most? Look in the mirror. A study making waves this week in Nature finds that people around the world show emotion on their ...

Credit - Photo-Illustration by Chloe Dowling for TIME (Source Images: Klaus Vedfelt—Getty Images, Tim Robberts—Getty Images, Kelvin Murray—Getty Images, Robert Recker—Getty Images, Howard ...

Whether at a birthday party in Brazil, a funeral in Kenya or protests in Hong Kong, humans all use variations of the same facial expressions in similar social contexts, such as smiles, frowns, ...

Cats can use hundreds of facial expressions to communicate, a new study reveals. Over the course of a year, researchers recorded a total of 276 distinct facial expressions used among a colony of 50 ...

The human facial action coding system, or FACS, has been developed as a tool for cross-species systematic comparisons of facial muscles to help interpret the resulting facial expressions of the common ...