Why do individual humans have such unique faces while animals have faces that are all similar? Is this purely perception? Are we actually just as similar looking to each other as the animals are?
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A lot of animals are scent-based; dogs ID each other by scent more than anything, humans lost that ability thousands of generations ago.
A lot of birds have distinctive markings in UV light; humans can‘t see in UV light.
What we can do VERY well is pick up visual signs; you‘re so much better at seeing far away and fine things as a bloodhound is picking up a scent trail versus your clumsy nose. Dogs spent their brain points on nose, humans spent them on sight.
On top of that, humans have much more complex social interactions than other animals, done mainly through our face. A wolf pack may have to express when they’re scared or it’s time to hunt or they’re happy; humans can perform Shakespeare. Lots more range and subtle shading, most of it done through the face. That’s why we have so much facial control and recognition.
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