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nypost.com ‘Puppy dog eyes’ were developed to appeal to humans: research

NEW YORK — What’s behind those hard-to-resist puppy dog eyes? New research suggests that over thousands of years of dog domestication, people preferred pups that could pull off that appealing, sad look. And that encouraged the development of the facial muscle that creates it. Today, pooches use the muscle to raise their eyebrows and make...
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