I want to know the answer to the following question:
What do East Asians have to thank for their relatively light skin?
All the background I'm provided with is that "Scientists discovered a skin-lighting mutation that partially accounts for the appearance of Light skin in humans (people who migrated out of Africa northward into what is now Europe) which they estimate occurred 20,000 to 50,000 years ago.". Is that enough to answer the question?