Quote from the good professors link:
"It is hypothesized that epicanthic folds are caused by climatic factors and it may have originated more than once during human evolution. The genetic basis of epicanthic folds is not well understood."
Bottom line, some things we just ain't sure of.
To Steelplate's point, absolutely the different pigmentations appear to come from climate exposure and adaptation. And we absolutely are made the same way, no matter our skin color or eye covering formation. And I didn't need science to tell me that, but they have, and once again science supports biblical teaching by doing so.
Like I said, some things we just ain't sure of, but my faith is strong enough to believe that God and science can co-exist. In other words, it doesn't have to be an all or nothing choice.