Dog owners have long been aware of the phenomenon of puppy dog eyes -- just a simple glance from a canine companion can soften even the hardest of human hearts.
원문출처 : https://www.cnn.com/2019/06/18/europe/puppy-dog-eyes-evolved-intl-scli/index.html
원문출처 : https://www.cnn.com/2019/06/18/europe/puppy-dog-eyes-evolved-intl-scli/index.html