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 ...

Researchers have successfully adapted a standardized system for analyzing facial expressions to include bonobos, our closest living relatives alongside chimpanzees. The study, led by an international ...

I am tired of studying Donald Trump’s facial expressions, but I can’t help myself. People keep asking me for my scientific opinion of Trump’s facial expressions. That’s a tall order. I do anatomically ...