Puppy-dog eyes aren’t just for pets

Dogs are known for looking up at their humans with wide, pleading “puppy-dog eyes” when they’re hoping for a treat or a scratch. While it’s nice to think our pets use this sweet look only with people they love, a new study suggests that wild dogs also use it to communicate with each other. Modern dogs have well-developed muscles in their faces that help them make a range of facial expressions, including the puppy-dog eyes look. A 2019 study found that these muscles were more pronounced in domesticated (adapted to live with humans) dogs than in wild wolves. Scientists believe that dogs evolved (changed very slowly over time) from wolves about 15,000 years ago, around the time they started living with humans. The authors of the 2019 study said their…

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The Week Junior US (Digital) - 1 Issue, Issue 217

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