What’s the reason behind asian eye shape?
In: Biology
Short answer: we don’t know. Possible explanations include defense against sun, but also maybe cold, snow, or sand.
It’s also possible it may have also been non-functional, and have been a secondary sexual characteristic. It may have been selected for as an ‘attractive’ trait.
It’s also possible that the eye shape is not really important evolutionarily, but just got segregated geographically
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