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The research joins a number of studies probing the extraordinary relationship between humans and their canine companions, including work suggesting dogs understand both the words and the tone of human speech.
The results reveal that the pooches produced far more facial expressions when the human was facing the dog, than when they turned away — in particular, the animals were more likely to show their tongues and raise their inner eyebrows.
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The study suggested doggy expressions were not simply the result of internal emotions, but could be a mechanism of communication.
Description: The research pushes back against the belief that animal facial expressions are largely unconscious movements, that reflect internal sentiments, rather than a way to communicate.