Coyotes turn out to have face muscles that look capable of making that big-eyed, sad-puppy face that dogs have used to melt human hearts for eons. That discovery supports a rethink of humans’ history ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Dog owners have long been aware of the ...

This is read by an automated voice. Please report any issues or inconsistencies here. Working out your face the way you work out your body makes sense. Muscles respond to movement, circulation ...