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And as they learned to walk up erect (they were about 3-4 ft. tall now), their mobility was greatly enhanced that they began migrating in different regions of the planet in search of more food & evolved into different colors with different features pending on the region that they were in Indeed, they had to evolve relative to the demands of the environment so that they can adapt to the constraints it imposes or else, they won't survive! Hence, those who went to the hot regions developed darker skin compliments of more melatonin (the biological mechanism of this is too long to explain here) whereas those who ended-up in the cold regions developed longer & pointed noses so as as to warm-up the breathed air Once again, the biological [celluar & molecular] mechanism of this is too long to explain here. But overall, this is the beautiful story of EVOLUTION which is greatly simplified in this article yet evolution's legit since we have TONS of evidences to prove it!
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Asia
