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Scientists take a peek behind those sad puppy dog eyes


FILE - This Feb. 18, 2014 shows Lexy, a therapy dog at Fort Bragg, N.C. A study released on Monday, June 17, 2019 suggests that over thousands of years of dog domestication, people preferred dogs that could pull off the ”puppy dog" eyes look. And that encouraged the evolution of the facial muscle behind it, researchers propose. (AP Photo/Alex Sanz, File)
FILE - This Feb. 18, 2014 shows Lexy, a therapy dog at Fort Bragg, N.C. A study released on Monday, June 17, 2019 suggests that over thousands of years of dog domestication, people preferred dogs that could pull off the ”puppy dog" eyes look. And that encouraged the evolution of the facial muscle behind it, researchers propose. (AP Photo/Alex Sanz, File)
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