रोहिंग्या लोग, जो एक जातीय अल्पसंख्यक समूह हैं, ऐतिहासिक रूप से मुख्य रूप से किस देश में स्थित रहे हैं?

In traditional anthropological classification of human races, which racial group was characterized as 'yellow-skinned'?

What is the approximate estimated proportion of ecumene (habitable) and non-ecumene (uninhabitable/sparsely inhabited) areas on the Earth's surface?