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.

Dogs have evolved face muscles that move much quicker than those of their wolf relatives – which means their faces move in a way reminiscent of human ones. These faster facial muscles allow for better ...

African wild dogs might use facial expressions to communicate with each other as they hunt in packs on the savanna. Arno Meintjes via Flickr under CC BY-NC-SA 2.0 DEED Puppy-dog eyes are irresistible.

Humans domesticated dogs about 30,000 years ago. Since then, we've worked with them, hunted with them, played with them, and come to rely on them for companionship. And, in the process, we've bred ...

We know our faces may give away our fibs -- whether it's shifty eyes, a sweaty upper lip, a slight smirk, or Pinocchio's fictitious lengthening nose. Now a new study reveals that muscles in the upper ...

A while back I wrote that connection is more than just looking at someone with feeling. There are actually 10 different ways that it’s possible to connect with people when speaking to them. It’s ...

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 ...

Facial expressions of emotion—such as the joyful smile you might display when encountering a friend or your angry frown when being cut off in traffic—are powerful social signals that are able to evoke ...