Samwik. Your comments re. reflective environments are widely accepted. East Asians evidently have very little melanin but plenty of keratin in their skin. This reflects sunlight very effectively. The East Asian eyes shape also indicates a reflective environment. Where might these characteristics have evolved? My guess is in the high altitudes of what is now Western China and Mongolia. Both white skin and these East Asian features presumably developed before people had clothes. What evidence do you have they developed only as recently as 50,000 years ago?