The researchers compared the evolution of wolves with dogs and also considered the fact that how a canine started to evolve when being domesticated by a Stone Age man.
The anatomical analysis of the study revealed that modern dogs have developed smaller muscles around their eyes which help them to lift their inner eyebrows. On the other hand, wolves hardly possess any similar muscle.
This stark difference between these two species in term of evolutions made the scientists conclude that humans prefer ‘puppy eyes’ and give them selective advantage.
The researchers also suggest this movement by dogs increases the human desire to look after them. Further, the team also compared the behaviour of wolves and dogs when exposed to humans and found out another reason to support their finding. The researchers said that dogs raise their eyebrows more often and with a higher intensity than wolves.
Another study done on this subject in 2015 concluded that eye contact between humans and dogs trigger a hormonal response which is similar to the one between a mother and baby. Whoa!
End of the article
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