Every dog owner knows how hard it can be to say no to "puppy-dog eyes," but a new study shines light on how canine facial expressions evolved and why humans are able to understand them so well.

Stubbing your toe on a table leg or fracturing your wrist will probably make you wince in pain (and possibly curse). It's a natural reaction; facial expressions play an important role in communicating ...

The muscles that allow for the "puppy-dog eyes" in domestic dogs is undeveloped in wolves, suggesting that the adorable look evolved to captivate humans. (Pictured: The author's dog, Smoky.) Courtesy ...

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 ...

SAN FRANCISCO, Dec. 29, 2008 -- Facial expressions of emotion are hardwired into our genes, according to a study published today in the Journal of Personality and Social Psychology. The research ...

Researchers have invented an earphone that can continuously track full facial expressions by observing the contour of the cheeks - and can then translate expressions into emojis or silent speech ...